201101  
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   1. Optimized Model for the Layout Planning of Freeway Service Areas
    作者姓名: Lindi Duan, Xiyuan Hu, and Huarong Wang  
  摘要:   In view of the inadequateness that exists in standards and specifications for freeway service area in China, this paper carried out research on the layout problems related to freeway service areas. Firstly, the freeway service areas were categorized into 3 types according to the area’s function and size, and then their corresponding function characteristics and scales were described qualitatively and quantitatively. Secondly, the factors influencing freeway service areas were determined as freeway type, traffic volume and drive-in rate, vehicle property, the landscape along freeways, function coordination. Thirdly, this paper set a distance-based optimizing model for single freeway service area layout, and then put forward the optimization criteria and procedure for service areas of freeway network. Finally, the theory was validated by applying the layout optimization model with Hubei Province.  
  关键词: Freeway service areas; Layout planning; Optimized model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1
 
   2. Analysis of Traffic Capacity at Harbor Public Channel: A Simulation Approach
    作者姓名: Jianfeng Dai, Xining Yan, and Yuanqiao Wen  
  摘要:   The study involves a functional simulation model for the maritime transit traffic in the harbor public channel that investigates the channel traffic capacity. The model provides a platform to analyze the effects of factors such as Rules and Regulations,vessel type and its proportion, vessel speed, safety distance between ships, scheduling strategy, meteorological and hydrological conditions etc. on the traffic capacity of the harbor public channel. The model has inbuilt flexibility to consider additional variables and parameters depending on data availability and scenarios to be examined. The results obtained from the study clearly indicate that some interesting relationships exist among these factors.  
  关键词: Simulation Harbor public Channel Traffic Capacity  
  下载:         下载 [6 ]  
  vol   1 (1)  :9
 
   3. The Analysis of Bus Traffic Behavior and Safety Control
    作者姓名: Panqing Wang  
  摘要:   Due to the increase in traffic, bus’s traffic safety problem has been always drawing people’s attention. This paper intends to conduct a scientific analysis of bus traffic behavior, mainly focusing on the bad traffic behavior. And on this basis, study on how to maintain safety control is conducted.  
  关键词: bus;traffic behavior;safety control  
  下载:         下载 [6 ]  
  vol   1 (1)  :22
 
   4. 26Bus Fleet Management System for BRT Based on Platform Screen Doors
    作者姓名: Chonghua Zhou, Zhizhe Su, and Zhang Hui  
  摘要:   The policy of “Public Transport Priority” is a principal strategy for urban traffic development. Bus Rapid Transit (BRT) is an crucial part of city public transport. More and more cities have built and operated BRT in the world, and many cities in China have planned and built it recently. The Platform Screen Doors (PSDs) system is an important component at BRT stations, and it not only screens platform from bus lane to offer a safe and comfortable environment for passengers, but also can offer bus position information to Bus Fleet Management System (BFMS) which manage operating bus fleet. Compared with the traditional BFMS based on GPS (Global Position System), this system locates bus position of arrival/departure at station platform based on signpost technology which is similar to the Platform Screen Doors (PSDs) system. Only when the bus stops at depot within a permissible error distance, the driver can open/close PSDs using onboard transmitter to send out a signal which is received by the Platform receivers mounted at Platform edge. Using location technology of PSDs, the system of BFMS for BRT can offer bus fleet management including basic information assembly, bus real-time monitor, bus operating etc. It is applied in China?s cities such as Jinan and Zhengzhou etc, and the system of BFMS for BRT offers a good assistance for BRT operator.  
  关键词: Fleet Management System; Bus Rapid Transit; Platform Screen Doors  
  下载:         下载 [6 ]  
  vol   1 (1)  :26
 
   5. Mathematical Model of the Inverse Problem of Deformation of Oil Tank Bottom
    作者姓名: Junjun Du, He Tang, Xing Chen, and Shesheng Zhang  
  摘要:   Nowadays, to predict the deformation of the bottom of oil tank has been an urgent problem of oil storage and processing enterprises in transportation engineering. Using body-fitted coordinate system, the inverse problem mathematical model of the deformation of the bottom of oil tank is established, and the two-dimensional oil reserve integral expressions are derived. Between oil reserves, vertical angle, heeling angle and the oil level height, the relative function is derived. Our prediction value of oil reserves is compared with the actual measured one, and the accuracy is higher than 95%.  
  关键词: oil tank;inverse problem;mathematical model  
  下载:         下载 [6 ]  
  vol   1 (1)  :33
 
   6. The Quantitative Evaluation of Shanghai World Expo Impact on Transportation
    作者姓名: He Tang, Wei Han, Renfu Wang, Junjun Du, and Sheshen Zhang  
  摘要:   It is a hot project to research Shanghai World Expo (SWE) influencing transportation. Based on factor analysis, three periods quantitative evaluation mathematic model of Shanghai world expo impact on transportation is established. By using of principal component analysis algorithm and factor analysis method, the results of Shanghai World Expo impact on transportation are obtained.  
  关键词: Shanghai world expo; factor analysis; "haas graph" principle; transportation  
  下载:         下载 [6 ]  
  vol   1 (1)  :39
 
   7. 53A Theoretical Approach for ITS Data Analyses Using Cyber Infrastructure
    作者姓名: Yingjie Xia, Zhenyu Shan, Kuang Li, and Xingmin Shi  
  摘要:   This paper presents a theoretical approach that has been developed to capture the computational intensity and computing resource requirements of intelligent transportation system (ITS) data and analysis methods. These requirements can be transformed into a common framework, region-based divisions of ITS computational data processing, which supports the efficient use of cyber infrastructure. The computational transformation is performed to characterize the computational intensity of a particular ITS data analyses. The application of the theoretical approach is illustrated using two ITS data processing methods: multi-sensor data fusion by integrating federated Kalman filter and D-S evidence theory, and geospatial computation on GPS data for urban traffic monitoring. Through the application, the development of region-based division method is decoupled from specific high performance computer architecture and implementations, which makes the design of generic parallel processing solutions feasible for ITS data analyses. The experimental results show that the framework can be applied to divide the ITS data analyses based on regions into a balanced set of computing tasks, and parallelizing data fusion and geospatial computation algorithms achieves better speedup.  
  关键词: automotive engineering, transportation safety, expressway, tunnel exit, visual feature  
  下载:         下载 [6 ]  
  vol   1 (1)  :45
 
   8. A Theoretical Approach for ITS Data Analyses Using Cyber Infrastructure
    作者姓名: Yingjie Xia, Zhenyu Shan, Li Kuang, Xingmin Shi  
  摘要:   This paper presents a theoretical approach that has been developed to capture the computational intensity and computing resource requirements of intelligent transportation system (ITS) data and analysis methods. These requirements can be transformed into a common framework, region-based divisions of ITS computational data processing, which supports the efficient use of emerging cyberinfrastructure environments. The computational transformation is performed to characterize the computational intensity of a particular ITS data analyses based on the characteristics of transportation regions as well as specific analyses operations. Two key types of transformational functions, data-centric and operation-centric, are identified and their relationships are elucidated. The application of the approach is illustrated using two ITS data processing methods: multi-sensor fusion by integrating federated Kalman filter and D-S evidence theory, and geospatial computation for urban traffic monitoring which takes three processing steps, coordinates transforming, map matching and curve approximating on the data from probe vehicle . We describe the underpinnings of these two methods, present their conventional sequential or coarse-grained parallel algorithms, and then address their latent fine-grained parallelism based on region-based divisions of ITS data. Through the application of this theoretical approach, the development of region-based division method is decoupled from specific high performance computer architecture, data-centric or operation-centric transformation and task scheduling implementations, which makes the design of generic parallel processing solutions feasible for ITS data analyses. A preliminary performance evaluation was designed to benchmark the performance of heterogeneous data fusion and computation on the cyberinfrastructure of grid with some specific devices for parallel computation, such as general purpose GPU. The experimental results show that the framework can be applied to divide the ITS data analyses based on regions into a balanced set of computing tasks, and the speedup performance of parallelizing data fusion and geospatial computation algorithms is optimal.  
  关键词: Intelligent transportation system; Cyberinfrastructure; multi-sensor fusion; geospatial computation; fine-grained parallelism  
  下载:         下载 [6 ]  
  vol   1 (1)  :53
 
   9. Study of Recovery Reliability and Its Influencing Factors
    作者姓名: Xiru Tang and Yanyan Chen  
  摘要:   In the paper, the road network traffic recovery reliability is defined as the probability that the road network affected by the incident being able to recover to formal performance condition within expected time. Various factors that influencing the road network recovery reliability (e.g. incident nature; incident clearance efficiency; road congestion degree; alternative route availability and information availability), are analyzed. An evaluation method for recovery reliability is proposed and the method is tested on a local road network in Beijing. The numerical results revealed the relationship between the recovery reliability and its influencing factors, which gave us useful guideline for traffic management and plan.  
  关键词: traffic safety; road network recovery reliabiltiy; simulation model; traffic event;  
  下载:         下载 [6 ]  
  vol   1 (1)  :60
 
   10. Bus Rapid Transit Optimization Network Based on Bi-Level Programming Model
    作者姓名: Wei-Xiong Zha, Wen-Tao Zhao, Cao Lei, and Shi-Bin Wang  
  摘要:   This paper aims for public transport network system to use small investment in public transportation enterprises and set up the bi-level program model. It also studies the problem of designing the conventional public transportation network. The model fully reflects the different decision-making behaviors and the interaction between the supply and demand corresponding with the actual needs. It uses MATLAB 7.1 to program genetic algorithms for solving the model, and obtains road network design of the conventional public transportation network for optimization. Finally, through the example of Nanchang transit network optimization, the result shows that bi-level programming model for the design of the public transport network is feasible and effective.  
  关键词: Bus Rapid Transit;bi-level programming; genetic algorithms; transit network  
  下载:         下载 [6 ]  
  vol   1 (1)  :74
 
   11. A Method of Highway Electromechanical System Facilities Maintenance Quality Assessment Based on AHP and Fuzzy Theory
    作者姓名: 张智勇,储诚赞,朱立伟,方正鹏  
  摘要:   Aiming at the structure feature and maintenance quality situation of highway electromechanical system facilities in China and in order to evaluate the current operation of the system scientifically and objectively, the comprehensive evaluation method of electromechanical facilities maintenance quality was studied. Based on the combination of qualitative and quantitative index, five-layer analytic hierarchy process (AHP) structure model and fuzzy mathematical theory is applied to conduct comprehensive assessment of electromechanical system facilities operation. The weight of every layer impact factor was analyzed and established through the integrated manner of questionnaire survey, on-the-spot investigation, expert consultation and adaptive adjustment. The result of proposed methodology technique can provide more precise weight data for maintenance quality assessment.  
  关键词: electromechanical system facilities, comprehensive assessment, analytic hierarchy process (AHP) structure model, fuzzy mathematics  
  下载:         下载 [6 ]  
  vol   1 (1)  :84
 
   12. Study on the Application of Interval Speed Monitoring Technology and Vehicle Track Pattern Confirming Technology in Road Network
    作者姓名: Xinyong Zhao and Shi An  
  摘要:   Speed Management is an important part of Road Traffic Safety Management. As the amount of vehicles on the road has greatly increased and the anti-monitoring means has increased as well, the traditional speed monitoring measures, including the fixed-point monitoring and the moving monitoring are also not efficient now a days. Based on the existing systems of traffic police department and transport sectors, this paper designs and reconstructs a new type of vehicle monitoring system in road network, using the interval speed monitoring technology and vehicle track pattern confirming technology as the main technical means. The system can be used in speed monitoring, track down dispatched and the fake license plate identification. The application indicates that the system could cover larger area of road network, be more accurate in speed measuring, more extensible in further application, and more capable in anti-monitoring.  
  关键词: interval speed monitoring, vehicle track pattern, license plate identification  
  下载:         下载 [6 ]  
  vol   1 (1)  :91
 
   13. Study on the Intellectualized Evaluation Model for Arterial Highway Safety Countermeasure
    作者姓名: Feng Lu  
  摘要:   There are many factors with complicated inter- relationships that affect arterial highway safety. Many uncertainties exist between traffic safety countermeasures and their expected effectiveness. In the process of developing countermeasures of arterial highway traffic accident prevention, it is an essential task of current traffic safety management to deal with the above-mentioned uncertainties effectively and to make scientific evaluation and selection of the countermeasures with an aim of allocating social resource reasonably. Upon systematic analysis of the characteristics of the traffic accidents and summarization of highway safety countermeasures, the arterial highway safety countermeasure system is proposed. With Crash Reduction Factor (CRF) borrowed from USA applied, the effectiveness analysis of arterial highway safety countermeasures is implemented. Based on the above, and with help of Inductive Learning Approach, the intellectualized evaluation model for arterial highway safety countermeasure is established.  
  关键词: Arterial Highway; Highway Safety Countermeasure; Intellectualized Evaluation Model; Inductive Learning Approach  
  下载:         下载 [6 ]  
  vol   1 (1)  :97
 
   14. Research on Index System of Traffic Safety Level Evaluation (TSLE) to Road Network
    作者姓名: Dehua Wu  
  摘要:   To evaluate the situation of traffic safety level of road network comprehensively and systematically based on the analysis of research profile home and abroad, the function of TSLE index of road network is analyzed theoretically, and different safety standards are compared and developed. According to the principle of index choice, a comprehensive assessment of road network safety indicators is constructed. Case analysis shows that this index can be used to provide technical support and decision-making basis for the evaluation of traffic safety level of road network.  
  关键词: 公路网;交通安全评价;;综合评价指标;评价标准 ( Traffic Engineering;Traffic Safety Evaluation; construct;Highway Network ;Comprehensive evaluation index;Evaluation criteria.)  
  下载:         下载 [6 ]  
  vol   1 (1)  :104
 
   15. Factor Analysis on VRU Safety in Beijing
    作者姓名: Xiaoqin Lan and Yanyan Chen  
  摘要:   In the low and middle income countries including China, the majority of such deaths and injuries are among “vulnerable road users” (VRUs) – pedestrians, bicyclists and motorcyclists. In this paper, we mainly focus on the safety of pedestrians and bicyclists in crossing the street. This paper studied the four main crossing places. The four places include: 1) near the intersection, 2) grade intersection, 3) The intersection within one of imports is three-dimensional form of crossing, 4) near the bus stop. The survey summarizes the main factors that lead to the traffic crash from road users? behavior, safety measurements, traffic channeling and so on .In order to reduce conflicts and improve the safety of vulnerable road users, it provided improvement countermeasures .  
  关键词: VRU safety, improvement countermeasures, pedestrian crossing  
  下载:         下载 [6 ]  
  vol   1 (1)  :112
 
   16. A New Model of Driving Decision: Considering the Deceleration Limitation
    作者姓名: Hua-Yan Shang, Yu Peng, and Hua-Pu Lu  
  摘要:   The key of the drivers’ behaviors are their driving decisions. To reveal the decision-making process, a new model with consideration of the deceleration limitation (DL) was built, based on a cellular automata (CA) model. In the DL model, the driver’s decision was divided into three steps: decision-making, action and result. And the acceleration was taken as a decision variable and also two other core factors, i.e. distance between adjacent vehicles and their own velocity, were considered. Simulation results show that the DL model can simulate the interaction between vehicles realistically and describe the phase transition of traffic flow well. Further analyses illustrate that the density’s change can cause the critical phase transition in traffic flow. These findings have effectively reproduced some realistic phenomenon and will help reduce the traffic congestion.  
  关键词: Driving Decision, Cellular Automaton, Deceleration Limitation, Traffic Flow, Phase Transition  
  下载:         下载 [6 ]  
  vol   1 (1)  :120
 
   17. Study on Traffic Safety Classification of Two-Lane Highway Intersection Based on Traffic Accident
    作者姓名: Lingtao Wu, Feng Li, Daoyue Peng, Guohua Shen, and Chengcheng Tang  
  摘要:   A comprehensive road traffic Accident Index (AI) of two-lane highway intersection is established, using statistical value of traffic accidents. About 170 highway intersections are surveyed, accidents happened in recent four years at these intersections are collected, and AI of each intersection is calculated. The AI of the intersections is analyzed by the clustering statistical method and the critical value of each grade is generated. The results will provide reference to improving highway intersection safety, and help to optimize the allocation of resources.  
  关键词: Road Traffic Safety; Highway; Intersection; Safety Classification  
  下载:         下载 [6 ]  
  vol   1 (1)  :127
 
   18. Simulation and Analysis of Time-Consumption of Emergency Supplies Loading Services Based on Queue Theory
    作者姓名: Jianguo Li and Cong Li  
  摘要:   After an incident or disaster happened, the most important thing sent was emergency supplies and equipment to affected area or refugee shelter. During this process the vehicle coming to emergency center and loading supplies are relatively time-consuming. In this paper the time consumed by the vehicle to arrive at emergency center is assumed subject to Gaussian distribution and supplies loading time consumption is subject to exponential distribution. Based on this hypothesis, a GI/M/1 of vehicle arrives and supplies loading model was described, and the average vehicle waiting-time and waiting queue length expression are given. After that a simulation model was established by ExtendSim. At the end of this paper the error between the theoretical expression and simulation data were analyzed. The result showed that using queue theory to analyze the time-consumption of emergency logistics was worthy to be considered by decision maker.  
  关键词: Emergency Logistics; Queue Theory;GI/M/1; Extendsim  
  下载:         下载 [6 ]  
  vol   1 (1)  :135
 
   19. Public Transit Service Bottleneck Diagnosis Index System Based on Automated Data Collection
    作者姓名: Xuewu Chen, Yingxiang Yang, Song Zhang, and Suping Chen  
  摘要:   Urban public transportation system is an essential component of urban infrastructure. The service quality of urban public transportation system is closely related to living quality of citizens. Automated Data collection systems such as bus IC card and GPS systems have been widely equipped in China. These systems contain large amount of information for traffic administrators. This paper uses data mining technology to extract information useful for bus service bottleneck identification from ADC systems. The bottleneck identification index system concerns about both bus service reliability and convenience. It is consisted of 4 indices: excessive travel time, travel time regularity, degree of punctual at station and average waiting time at station. The definition and calculation of each index is described in the paper.  
  关键词: bus service bottleneck, identification index system, ADC  
  下载:         下载 [6 ]  
  vol   1 (1)  :143
 
   20. Traffic Safety Assessment Method of the Vulnerable Road User at Urban Intersections
    作者姓名: Congying Li and Zhaofei Wang  
  摘要:   According to the traffic safety actuality of the vulnerable road user at urban intersections, the traffic safety assessment method was proposed based on BP neural network. Based on defining and classifying the concept of the vulnerable road user, travel demand of the different categories of the vulnerable road user from the aspects of physiological characteristics and social characteristics was concluded. Then safety assessment indexes system was built from two goals of traffic facilities and traffic organization. Finally,the comprehensive assessment software based on BP neural network was developed by C++ computer language. The result shows that the model of BP neural network was used in the assessment system of the vulnerable road user traffic safety at urban intersections, which has good applicability. It was proved by the example and showed that the method is operable and the result is credible.  
  关键词: traffic engineering; traffic safety; the vulnerable road user; assessment system; BP neural network  
  下载:         下载 [6 ]  
  vol   1 (1)  :151
 
   21. Driving Decision-Making Optimization Model Based on Precision Clocked Scan
    作者姓名: Xiaoyuan Wang, Jinglei Zhang, and Derong Tan  
  摘要:   Road traffic system is a man-involved complex system. Especially, the driver’s behavior decides considerable parts of its properties. Driving behavior is an information processing course going on unceasingly, and study on information processing pattern of the drivers forms the key foundation of road traffic safety and automobile safety design. Before time, method of clocked scan is used in the microcosmic simulation study of driving behavior and the step length is 1s. The lag caused by driving decision-making reaction time is ignored. At the same time, because of the non-accuracy, the simulation ability about driving behavior in stimulation of dynamic scene is reduced. The scanning step length is dropped to 0.1s in order to scan and analyze the dynamic (static) information which influences driving behavior exactly. Moreover, the most excellent decision-making is gained through fusing the information with fuzzy optimization. It is feasible to fuse the information with fuzzy optimization. Decision-making optimized process can be described more deeply through precision clocked scan.  
  关键词: driving behavior; decision-making optimization; precision clocked scan; fuzzy optimization  
  下载:         下载 [6 ]  
  vol   1 (1)  :158
 
   22. Post-Earthquake Emergency Safety Assessment of Road Retaining Wall
    作者姓名: Xiaoyuan Wang, Jinglei Zhang, and Derong Tan  
  摘要:   The retaining wall is an important part of the transportation system. Once it gets damaged in an earthquake, it not only creates huge direct economic loss, but also creates difficulties to the rescue work. On 12 May 2008, a magnitude 8.0 earthquake occurred in WenChuan of Sichuan province; destroyed many of the retaining walls existed. Therefore, the research on emergency assessment of the retaining wall damaged in earthquake has practical significance to the structure seismic performance evaluation and the earthquake emergency. In this paper, the key issues associated with post-earthquake emergency inspections of retaining walls are presented, such as the forms of retaining wall damage, the damage features under earthquake and the influence factors. Safety criteria are established and correlations of such criteria with various damage states are given. This paper presents the methods followed in the evaluation process, highlights the items for evaluation and intends to provide technical references for the post-earthquake disease prevention, diagnosis and disease treatment.  
  关键词: emergency assessment, retaining wall, seismic performance  
  下载:         下载 [6 ]  
  vol   1 (1)  :174
 
   23. Safety Treatment Technique for Continuous Downgrade Slope
    作者姓名: Jin-mei Wu, Xiu-feng Yang, and Xiao-yi Mi  
  摘要:   It is a potential danger for heavy trucks running on long and downgrade slopes, while these slopes are inevitable in mountainous terrain highway design. Recent statistics analysis shows that mountainous terrain highway traffic accidents mainly happened on the section of continuous downgrade slopes. Meanwhile, with the development of transportation industry, accidents frequency on continuous downgrade slopes has been increasing rapidly. The traffic safety on those slopes is becoming a social focus spot. In this paper, through investigating the traffic characteristics of domestic typical continuous downgrade slope sections, collecting the data of road technology parameters, truck loads, accidents, etc. the author made study on accident causes of truck brake-failure, and put forward safety counter measures for continuous downgrade slopes, considering existing methods, effects, and problems.  
  关键词: 连续下坡;制动失灵;超载  
  下载:         下载 [6 ]  
  vol   1 (1)  :182
 
   24. Application of Integrated Electric Propulsion System in 2000 m3 Dredger
    作者姓名: Menglian Wang, Bing Wang, and Fei Long  
  摘要:   The paper introduces a solution for integrated electric propulsion systems in the 2000 m3 self-propelled suction dredger. The integrated electric propulsion system functions are described in detail. It also discusses several key problems involved in integrated electric propulsion system design, including varying frequency driving plan, harmonic wave estimation, power management system design, propulsion and dredging monitoring and control system design. By using the integrated electric propulsion system in the dredger, it realizes various functions including the unified power supply, power management, variable frequency drive and comprehensive monitoring and control. It has greatly increased overall effects and high automation of the dredger. Meanwhile it is also saves energy by adopting integrated electric propulsion solution. This will be a new direction for green-energy equipped ships in domestic rivers.  
  关键词: Electric propulsion; Variable frequency drive; Power management  
  下载:         下载 [6 ]  
  vol   1 (1)  :190
 
   25. Discriminant Method of Urban Road Traffic Conditions Based on Cloud Model
    作者姓名: Qingfang Yang and Biao Zhang  
  摘要:   Urban road traffic conditions identifying can discriminate the road conditions using quantitative data of road network. A new urban road traffic conditions identifying method based on cloud model was proposed according to the cloud model?s feature that it can achieve the natural conversion from quantitative data to qualitative concept; it can convert from the data of traffic parameters to traffic state smoothly. When classifying the regional traffic state, first, the state of intersections and links are classified respectively, second, with weighted average the state of intersections and links, the regional traffic state was given. A simulation was proposed by software VISSIM finally. A comparative analysis showed positive and encouraging results.  
  关键词: intelligent transportation systems; urban road; traffic conditions; cloud model; membership degree  
  下载:         下载 [6 ]  
  vol   1 (1)  :197
 
   26. Quantitative Identification of the Main Factors of Traffic Signs
    作者姓名: Fengyuan Wang, Yuhua Ren, and Guojun Liu  
  摘要:   If the road traffic facility is set in improper way, it will lead to a wrong driving behavior and thus leads to accidents. Whereas the traffic facilities have too many varieties and have no strict installation regulation, these will produce huge study workload. The questionnaire form for traffic facilities on driving behavior safety investigation was designed with 21 items which closely relate to drivers' daily life. The evaluation indices have obvious effects on driving behaviour. Some indices have significant correlation with each other. If major factors are ascertained, workload for later work will be reduced. The impact of every factor to traffic safety will be obvious. This will provide more convenience for formulating quantitative model about traffic facilities and traffic safety. Statistical software was used to simplify the effective factors of complicated traffic facilities, to gain the major factors, to provide theoretical basis for the later study about the correlation between traffic facilities and driving behaviour. The factor analysis method was used to study the variables in the questionnaires. Six major factors were picked out with variable load. The maximum value of variance rotation method was used for structure simplification. It is found that eigenvalues of the six main factors were 4.027, 3.503, 3.336, 2.364, 1.834 and 1.486. The finally accumulated explaining variance is 78.848 percent.  
  关键词: Traffic Facility; Driving Behavior; Main Factor Analysis, Traffic Safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :206
 
   27. Developing Crash Worthiness Index and Crash Aggressivity Index
    作者姓名: Helai Huang, Mohamed Abdel-Aty, and Chowdhury Siddiqui  
  摘要:   Crash aggressivity (CA), along with conventional crash worthiness (CW), has been recently studied to deal with the crash incompatibility between vehicles on roads. This study proposes a systematic crash-based approach to index CA and CW of various vehicles. The approach deviates from existing methods in three aspects: (a) an explicit definition and specification in the model for CW and CA; (b) Bayesian hierarchical analysis to account for the crash-vehicle two-level data structure; (c) a five-level ordinal model to explicitly consider all levels of crash severity.  
  关键词: Crash compatibility; Crash worthiness; Crash aggressivity; Bayesian hierarchical model; Ordered logistic model  
  下载:         下载 [6 ]  
  vol   1 (1)  :212
 
   28. Systematic Investigation and Analysis of Traffic Composition Characteristics in Chinese Highways
    作者姓名: Tiejun Zhang, Dezao Hou, and Lingjie Li  
  摘要:   Both highway design and management are aiming at the needs of running vehicles, which shows the significance of traffic composition characteristic including traffic capacity and safety. The development of the economy and mechanization influence the traffic composition deeply. In order to reflect the actual traffic characteristics as to provide some evidence for road designers and managers, especially in barrier design. This paper does some systematic investigation and analysis work using the real traffic data collected from different level highways. Basing on the Chinese plan of 11th 5 years, 8 economic regions and are divided to represent the whole condition in China. Different functions such as highways are divided into expressways, national and provincial highways. The relationship between economic and traffic composition characteristic are also analyzed, and two kinds of whole results are provided using simple average method and GDP weighting method. The typical truck mass is also provided.  
  关键词: traffic composition, expressway, national and provincial highway  
  下载:         下载 [6 ]  
  vol   1 (1)  :219
 
   29. Managing Roadway Safety at the Traffic Analysis Zones Level
    作者姓名: Mohamed Abdel-Aty, Chowdhury Siddiqui, and Helai Huang  
  摘要:   This paper aims at managing safety at traffic analysis zones (TAZs) by investigating best sets of covariates for total, severe, peak hour, and pedestrian and bicycle-related crashes considering various types of trip productions and attractions in combination with roadway characteristics of the TAZs as explanatory variables. It is found that the severe crash model is the best fit by trip related predictors only; total crash and peak hour crash model are best fit for total trip attractions and total trip productions whereas pedestrian and bicycle related crash model is best described as road related predictors only.  
  关键词: Transportation Safety Planning, Safety management, traffic analysis zones, trip generation  
  下载:         下载 [6 ]  
  vol   1 (1)  :230
 
   30. Research on the Impact of Class 1 Highway Cross-Section Form and Access Density Design on Traffic Flow
    作者姓名: Chengli Chang, Jian Rong, and Futian Ren  
  摘要:   Class 1 highway is an important component part of multilane highway in our national highway net system and it has three typical cross-section forms. This article analyzes the effects of different central separator type, roadside separator type and roadside development degree on free flow speed. Two field highway survey data indicates that the central physical separator has no effect on the free flow speed. But the dual amber line separator can lower free flow speed 1.6km/h when traffic volume increases 100pcu/h. seven field highway survey data proves that roadside development degree has no effect on roadside physical separator highway. If physical separator is changed into white line separator, free flow speed will be lowered 2.5km/h when the roadside development degree increases 10%. Impact of access density on traffic flow mainly shows on highway safety. Traffic accident data and access density design analysis results get the impact of design on traffic flow. It introduces the concept of access equivalent intensity and establishes the relationship between access equivalent intensity and traffic accident rate. Suggestions are proposed to amend the highway design standard.  
  关键词: Class 1 highway, Cross section, Access, Traffic safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :237
 
   31. New Security Technologies and Inspection Equipment Application in Metro
    作者姓名: Wei-hua QIU ,Jian-hao SANG,Zhi-gang LIU,Jian LI  
  摘要:   This paper reviews current technology used in inspection equipment in Metro Security System of China. Comparison was made on the inspection equipment used in airport and custom which includes X-ray inspection equipment, Electron Backscatter Diffraction (EBSD) detection instrument, Ion Mobility Spectrometry Detection and Raman Spectroscopy equipment. Based on scenario of huge passenger flow of metro in China, an inspection equipment system set up is proposed.  
  关键词: Urban Rail Transit,Security Protection, Dangerous Goods Detection  
  下载:         下载 [6 ]  
  vol   1 (1)  :244
 
   32. Gray Evaluation of Safety by Traffic Conflict Technique at Intersections
    作者姓名: 杨淑丽(武汉理工交通学院) 林桦(武汉理工交通学院 副教授)  
  摘要:   Abstract:Owing to the traditional methods of evaluating intersections have certain defects, the paper applies the typical method that is combined with traffic conflict and grey clustering. The traffic conflict technique is a new method of statistical evaluation of a non-accident in transportation safety field. It is better than the traditional method of statistical evaluation because it is means of efficient and quantitative research to assess the present situation of traffic safety and improve security results. The ratio between traffic conflict and mixed traffic equivalence during morning peak hours, evening peak hours and common hours is chosen as the evaluation indexes. Then this method is used to evaluate the safety condition of 8 intersections in Liuzhou City. The conclusion accords with the fact, which proves that the presented method is feasible. Finally, the improvement measures of intersection safety were put forward.  
  关键词: Road Intersection ;Traffic conflict ; Gray clustering; Safety evaluation  
  下载:         下载 [6 ]  
  vol   1 (1)  :253
 
   33. The Influence of Road Users’ Personal Attributes on the Cognition of VMS
    作者姓名: Yin Chun'e  
  摘要:   Inorder to analyze the influnce of road user’s personal property on the cognition of VMS ,the stated preference (SP) method has been used. Through the questionnaire survey and related data collection, the influnce of different road user’s personal property of zhengzhou on the transportation induced strategy and route choice behavior of VMS’s traffic information services is included in this paper which faces to different types of vehicle drivers and different regions. The results show that the sex, age, educational background, the road familiarity, driving time and the type of vehicle and so on can have an impact to the cognition of VMS. The results can also provide an important reference to the better design and evaluation of the Information service of VMS.  
  关键词: VMS;SP;Personal Property;Cognition  
  下载:         下载 [6 ]  
  vol   1 (1)  :262
 
   34. Combination forecast model based on RBF neural network and its application in freight volume forecast
    作者姓名: 陈宁 赵学彧  
  摘要:   Forecasting freight volume scientifically is very important to the decision making of transportaion and economic development strageties.In the forecast of freight volume,It is hard to obtain the satisfactory results with the tradional individual econometric forecasting methods and models for its various relative factors. Compared with individual forecast methods ,the combination forecast method can improve the precision and stability of forecast results, and it is widely used in practice . In order to achieve a more accurate forecast result for freight volume ,after comparing the current methods and models for forecast and summerizing the basic idea of combined forecast, the paper provides the combination forecast model based on the RBF neural network..A fitting and forecast model based on the historical data of freight volume with various methods separetely is established,then the fitting and forecast results are mixed into the combination model for forecast by the RBF neural network.At last, a forecast example of freight volume in Fujian Province is presented ,and the results prove that the model for forecasting freight volume is effective and feasible,and it has a good practical value.  
  关键词: freight volume; combination model; RBF neural network;forecast  
  下载:         下载 [6 ]  
  vol   1 (1)  :268
 
   35. Public Transport Monitoring and Control: The Case of Porto Alegre, Brazil
    作者姓名: Ladeira, M, C.; Senna, L.A.S.; Michel, F.D.  
  摘要:   Management of urban mobility and road space optimization is increasingly supported by the use of technology. The effective control of urban transport systems depends on a strategic project to devise a systemic network to manage traffic and transport, focused on road safety and flow, optimized through Intelligent Transportation Systems - ITS. Nowadays it is not enough focus only on expanding the infrastructure to improve movement of vehicles; it is necessary to invest in ITS. The integration between the regulation system and information to user is the key to provide mobility. Data collected about the operation and traffic conditions are decisive for decision making and thus the synergy between traffic and transportation must be natural. This article aims to present the experience of Porto Alegre in providing mobility management and regulation of transport through the Central Monitoring and Control of Mobility- CECOMM supported by the effective use of ITS.  
  关键词: Intelligent Transportation System; Regulation;Decision-making  
  下载:         下载 [6 ]  
  vol   1 (1)  :275
 
   36. Multi-objective Emergency Resources Scheduling Model based on Utility Optimization
    作者姓名: xueying GAO, zhaosheng YANG, di SUN, peng GAO  
  摘要:   A multi-objective emergency resources scheduling model with transportation capacity constraint is proposed to raise multi-depot emergency resources scheduling efficiency and reduce casualties and property losses. In the proposed model, the time-variation of casualties is considered, and the maximum amount of effective relief commodities is the first objective. And the minimum transportation cost for emergency resources scheduling is also an important objective. During practical emergency rescue, multiple transportation means and their cost and capacity are main constraints. Moreover, the distribution of emergency in different depots influences strongly the scheduling of emergency resources. All of this has been discussed in the proposed model, and it is verified by an example. Experiment indicates that the proposed model is coincident with the practical emergency rescue.  
  关键词: emergency resources, nonlinear programming, multi-objective, transportation capacity constraints  
  下载:         下载 [6 ]  
  vol   1 (1)  :282
 
   37. Crash Analysis and Proper Countermeasures for Xi-Han Freeway
    作者姓名: Shuzhan HOU,Xiaoduan SUN,Yulong HE, Weibin LI  
  摘要:   Xi-Han Freeway is a unique freeway passing through a mountainous region with very challenging topography and complex climatic conditions. This freeway is built with many bridges and tunnels that greatly complicated the alignment design. Since its opening in 2007, the safety has become a serious concern due to the high crash risk. This paper presents the results of a crash analysis and consequent proposal on the crash countermeasures for Xi-Han Freeway are presented. This research provides evidence on how to improve safety of freeways in mountainous regions in China.  
  关键词: road safety, crash analysis, countermeasures  
  下载:         下载 [6 ]  
  vol   1 (1)  :290
 
   38. An Exploration of Choosing Shelters for Earthquake Emergency Evacuation
    作者姓名: Lei DU, Xiaokuan YANG  
  摘要:   The destructive forces of an earthquake are known to be very large. In addition, it is difficult to predict exactly when and how an earthquake will occur. Thus, earthquakes will, to a great extent, endanger people's lives and result in tremendous economic losses to society when they occur. In recent years, earthquakes have taken place worldwide, causing great damage to people’s lives and property. As a result, all levels of government across the world pay particular attention to earthquake emergency planning and incorporate emergency planning into their comprehensive transportation plans. Shelters, as the destination of evacuees, play an important role in earthquake emergency evacuation plans. The objective of this paper is to define principles of planning and layout for emergency evaluation shelters and to explore an approach for choosing suitable shelters for earthquake emergency evacuation. Likelihood-of-candidate, a comprehensive indicator for shelter selection, is introduced in this study as a tool to rank shelters to be chosen. Three factors are outlined as influencing the ranking of likelihood-of-candidate of a shelter: 1) capacity of facility, 2) quality of facility, and 3) accessibility. The likelihood-of-candidate model is built up to quantitatively determine the relative status of shelters to be chosen. The model is validated and calibrated using data from Beijing, China.  
  关键词: Emergency; Evacuation; Shelter; Olympic; likelihood-of-candidate  
  下载:         下载 [6 ]  
  vol   1 (1)  :299
 
   39. Traffic Information Collection Based on RFID and WSN
    作者姓名: 刘辉;徐沪平;周耀;胡振兴  
  摘要:   Obtaining real-time traffic information parameters accurately is one of the key techniques in Intelligent Transportation Systems. According to the features of traffic information---the large amount and the complexity, it comparatively analyses the merits and the demerits of Radio Frequency Identification(RFID)and Wireless Sensor Network(WSN)technologies, at the same time we discuss the feasibility of integrating RFID and WSN technologies and the advantages of this technologies are used in traffic management applications. The way which uses the RFID and WSN technologies in traffic management perfectly improves the ability of sensing environment and obtaining information. As a result, not only can it make up for shortcomings which WSN only can work in the limited range,but also can mark the object as an object tag and take the initiative to obtain the object information. Here,we design a new self-organized network structure and describe in detail how the both of RFID and WSN work together perfectly and how to sense the state messages of the surrounding objects and environment. So as to collect information which traffic management system need. Meanwhile we send those state messages to the Data Management Center by wireless communication technology at last. We can solve the problems of real-time、comprehensiveness、economy and reliability in the collection of traffic information effectively by this way. Overall, it offers a new、effective and possible way to make the traffic safer、more efficient and lower pollution.  
  关键词: Keywords: RFID, WSN, Technology Integration, Traffic Information Collection  
  下载:         下载 [6 ]  
  vol   1 (1)  :309
 
   40. Route Optimization for Hazardous Materials Transportation with Time-Window Constraints
    作者姓名: SHEN Xiaoyan, LIU Haoxue, XIE Pei  
  摘要:   Route optimization is one of most effectively measures for reducing the hazardous materials transportation risk by road. This paper discusses the problem related to route optimization for hazardous materials transportation with multiple time-windows constraints and time-varying attributes and for a given OD pair. Based on establishing a mathematical model for the above-mentioned route optimization problem, the proposed mathematical model is equivalently transformed into a static multi-objective shortest route problem reconstructed by the space-time network techniques, and an efficient dynamic labeling algorithm which can identify the most satisfied route is then developed. Finally, an example is taken for analyzing the effectiveness and practicability of the above-proposed method and algorithm. The result shows that the established route optimization model and algorithm have better operability in solving such complexity problem, which can provide technical support to decision-making of the government authorities and the road hazmat transport enterprises.  
  关键词: route optimization, hazardous materials, time-window constraints, dynamic labeling algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :316
 
   41. A Design and Implementation of GPS-MTD Based on Intelligent Agent in the Vehicle Navigation and Guidance System
    作者姓名: Bing-zhong Ren and Wen-huan Kong  
  摘要:   The urban traffic management information system has become an important way of solving traffic jam in cities. The paper designs a framework of vehicle navigating and guiding system using 3G mobile network and GIS electronic map according to information of moving objects. It discusses moving object’s time-space attributes which is described by a five-field and a directed graph. It designs a GPS moving terminal device (GPS-MTD) and analyzes the GPS-MTD’s software functions and hardware structures. It improves the function of GPS mobile apparatus which provide the guiding function using the shared information of traffic based on intelligent agent. The navigation based on the shortest path algorithm and ant colony optimization algorithm is been improved to one based on the real-time traffic flow of moving objects with GPS-MTD. The GPS-MTD provides the navigating and guiding decision-making for people.  
  关键词: moving objects; urban informatization; global positioning system; intelligent transport system; intelligent agent  
  下载:         下载 [6 ]  
  vol   1 (1)  :324
 
   42. Passenger Flow Assignment Model of Urban Rail Transit in Network Operating Condition
    作者姓名: Yuanchun Huang, Weihua Qiu, and Haize Pan  
  摘要:   Based on both of the principles of assignment of traffic and characters of railway, this paper designed and improved the function of Road block and the method of Ba-lanced distribution on railway. Furthermore, a case study of the railway network in Shanghai was conducted in this paper in order to validate the improved model and analyze the related parameter.  
  关键词: rail transit;passenger flow assignment;generalized cost;;path searching;user balance allocation  
  下载:         下载 [7 ]  
  vol   1 (1)  :333
 
   43. Investigation and Analysis of Two-Lane Highway Driving Track in Turn
    作者姓名: Lixin Wu, Jianfeng Xi, and Yufeng Guo  
  摘要:   Six simple curves were selected to survey driving track because of the features of many collision accidents in two-lane highway curves. Based on the analysis of trajectory excursion about large trucks, buses, small trucks and small passenger cars in the upward and downward direction, the characteristics of vehicle lateral excursion of different types were researched. And the relationship was established among vehicle types, radius of curve and cross-area tracks by measuring cross-area tracks of different radius. The result may provide some references for geometric design in two-lane highway.  
  关键词: two-lane highway;driving track; lateral excursion;cross-area tracks  
  下载:         下载 [6 ]  
  vol   1 (1)  :342
 
   44. Oculomotor Characteristics of Vehicle Drivers
    作者姓名: Jiangbi Hu, Shouran Zhang, and Yang Yang  
  摘要:   Vehicle drivers are the direct participants of road, traffic and environment systems. Over 90% of the driving decision-making and operation are based on visual cognition. Oculomotor is proposed as an index for safety road design and management on the basis of analyzing the relationship between the visual cognition need and oculomotor characteristics. Experimental researches indicate that drivers’ fixation points and attention areas are different at different driving speeds on certain road, traffic and environment system, but there are regulations to abide. The study on oculomotor characteristics is benefit to driving safety and road design and management.  
  关键词: oculomotor; visual cognition; drivers’ saccade; safety road  
  下载:         下载 [6 ]  
  vol   1 (1)  :350
 
   45. Traffic Injury Risks of Aging Drivers in Single Vehicle Collisions
    作者姓名: Huafei Sun, Richard Tay, and Lina Kattan  
  摘要:   The objective of this study is to identify factors which may contribute to injury risks of drivers aged 65 or older who are involved in single vehicle collisions in the City of Calgary in Canada. We find that being female, impaired, not using seatbelt, driving a van or driving under sun-glare tends to increase crash severity. Crash severity also tends to increase if the crash occurs at intersections, especially those without traffic control devices or involves the vehicle running off the road.  
  关键词: Ageing Drivers, Single Vehicle Collision, Logistic Regression, Injury Risks  
  下载:         下载 [6 ]  
  vol   1 (1)  :357
 
   46. Forecast of the Scale of Logistics Parks for Wuhan City
    作者姓名: Ning Chen and Hongming Wan  
  摘要:   This paper first analyzes the principles and method of determining the scale of Logistics Park, then based on the current situation of regional economic and logistics development in Wuhan, using Radial Basis Function Neural Network (RBF) to forecast the total demand of scale of Logistics Parks in Wuhan, then compare to the current planning and constructing scale of Logistics Park in Wuhan and give the corresponding view.  
  关键词: Wuhan; Logistics Park; Scale; Radial Basis Function Neural Network (RBF)  
  下载:         下载 [6 ]  
  vol   1 (1)  :362
 
   47. The Experience and Enlightenment on Traffic Organization of the 11th National Games Opening Ceremony
    作者姓名: Chen-hui Liu, Bo-ying Shi, Ru-hua Zhang, and Li Lei  
  摘要:   Because more than 80000 people joined, the opening Ceremony of the 11th National Games of People's Republic of China (PRC), was under large traffic pressure. The paper first analyzes the challenges that the opening ceremony faced. To ease traffic pressure, on one hand, traffic department took many measures to reduce traffic demand. On the other hand, traffic department increased public transit capacity by opening up temporary transit lines. Factual traffic operation analysis indicated traffic organization of the opening ceremony was very successful. Finally, the paper summarizes experience of traffic organization of the opening ceremony.  
  关键词: the 11th National Games Opening Ceremony; traffic organization; traffic demand management (TDM); the public transportation; large special events  
  下载:         下载 [6 ]  
  vol   1 (1)  :370
 
   48. Arterial Performance Measurement System with Wireless Magnetic Sensors
    作者姓名: Robert Kavaler, Karric Kwong, Akhila Raman, Pravin Varaiya, and Daniel Xing  
  摘要:   The Arterial Travel Time System (ATTS) is described. ATTS uses vehicle signatures from wireless magnetic sensors embedded in the pavement and a matching algorithm to re-identify vehicles between reference locations. It accurately estimates travel time distributions in real time, and also derives various other performance measures, including delay, level of service, and emissions. Results from the ATTS deployments in Chula Vista, CA, USA and New York City, USA are discussed. With signal phase information, ATTS can help improve signal settings, and identify vehicles running a red light or speeding.  
  关键词: arterial performance; travel time distribution; red light running; speed measurement; wireless sensors  
  下载:         下载 [6 ]  
  vol   1 (1)  :377
 
   49. Influence of Stirrup on Corrosive Expanding of Reinforced Concrete Member
    作者姓名: Yueshun Chen, Li Liu, and Jia-Xiang Wang  
  摘要:   With the role of stirrups in reinforced concrete structure, the process of the corrosive expanding crack in concrete protective layer has been delayed. In order to consider the role of stirrups, the square stirrup used in engineering practice has been equivalent to ring stirrup. On the one hand the upper and lower limit diameter of ring stirrup have been determined in this project, on the other hand the effective scope of stirrup have been studied, which could be used to simulate the role of stirrup simply and comfortably. And an existing reinforced bar corrosion expanding model has been fixed with it, which has been experimentally verified by the straight flow anodic polarization accelerated corrosion test results. For the operating conditions with stirrup space 100mm and 150mm, the measured and the predicted expanding crack width has to have a good consistency.  
  关键词: stirrup; reinforced bar; corrosive expanding model; corrosive crack  
  下载:         下载 [6 ]  
  vol   1 (1)  :386
 
   50. Study on Critical Corrosive Ratio of Reinforced Bar in Reinforced Concrete Based on Ultimate Tensile Strain
    作者姓名: Yueshun Chen, Li Liu, and Xia-Lin Lei  
  摘要:   The critical corrosive ratio of reinforced bar in RC structure is important for durability analysis when concrete protective layer becomes cracked by corrosive expanding. The ultimate tensile strain of concrete has been used to denote the crack of concrete study and the critical corrosive ratio in this paper, and the effective volume expansion ratio has been constructed to describe the effective expanding of corrosive rust, then the critical corrosive ratio model has been constructed with the ultimate tensile strain of concrete. An anodic polarization accelerated corrosion test has been chosen to simulate the corrosion of reinforced bar in reinforced concrete, and a good agreement has been shown between the calculated and the measured corrosive ratios.  
  关键词: critical corrosive ratio; ultimate tensile strain; effective volume expansion ratio; corrosive crack  
  下载:         下载 [6 ]  
  vol   1 (1)  :395
 
   51. Safety Impact of Access Management Techniques at Signalized Intersections
    作者姓名: Xuecai Xu, Hualiang Teng, and Valerian Kwigizile  
  摘要:   Signalized intersections next to each other spatially on the same arterial share some unobservable information such as traffic flow and roadway characteristics, thus this study is to investigate the impact of access management techniques on crash counts at signalized intersections where the unobservable information is considered by developing panel data crash count data models based on crash data from 300 signalized intersections in Southern Nevada. Panel data random-effect model was selected to take into account the unobserved factors for each unique arterial. It was showed that Negative Binomial regression models were better able to reflect the dispersion in the crash data. Therefore, the random-effect negative binomial model (RENB) was applied to investigate the relationship between crash occurrence and access management techniques. The results showed that five variables significantly affected the safety at signalized intersections. The average length of corner clearance had negative impact on intersection crash occurrence while the total traffic flow in all directions, land use types, the number of lanes for minor streets and posted speed limit on minor streets were positively related to crashes at signalized intersections.  
  关键词: Access Management; Signalized Intersection; Count Data Model; Panel Data Model  
  下载:         下载 [6 ]  
  vol   1 (1)  :403
 
   52. Study on Traffic Flow Optimization Model in a Signalized Urban Road Network
    作者姓名: Jin Wang and Xiaoguang Yang  
  摘要:   The optimization of traffic flow in a signalized urban road network is influenced not only by roads conditions, but also by traffic design and signal timing of intersections. Traditional traffic assignment models did not consider the traffic design elements in detail, and can not reflect the influence of traffic design on network traffic flow. The traffic flow optimization model was applied on a small urban road network in which all intersections were controlled by traffic signals. The model optimized the green splits and cycle length of traffic signals based on the traffic assignment model with fixed signals, and got the optimization result of road network traffic flow for a traffic design plan. This paper builds the traffic flow optimization model in urban road network with signals, studied the algorithm to solve the problem in an experiment network with VBA programming. The study indicated that the model had good convergence and global optimality, and could get the optimized network traffic flow for a traffic design plan.  
  关键词: network traffic flow; signalized intersection; optimization; traffic assignment  
  下载:         下载 [6 ]  
  vol   1 (1)  :417
 
   53. Development of Intelligent Terminal for Safety Monitoring of On-Road Van Transportation
    作者姓名: Xinliang Guo, Guangzhong Cao, Baoxiang Zhang, and Shouqin Zhou  
  摘要:   This paper presents an on-board system for safety monitoring of on-road van transportation, which is achieved by on-board intelligent terminal, wireless mobile communication and monitoring center. The intelligent terminal includes master unit and detecting unit. The master unit equipped with an integrated GPS receiver mainly receives and processes GPS data for getting van’s position and speed information. The detecting unit collects real-time status data of the van compartment, and carries out alarming when compartment door is illegally opened or destroyed, to ensure transportation process safety. It is proposed that a new method using ambient light sensor in the detecting unit to gather the status of the van compartment should be used. The design of the terminal’s hardware and software is described. On-road experiments have demonstrated the efficiency and applicability of the developed terminal.  
  关键词: conveyance security; intelligent terminal; remote monitoring  
  下载:         下载 [6 ]  
  vol   1 (1)  :426
 
   54. Analysis on the Settlement Characteristics of Lateral Displacement on the Soft-Soil Road Bed
    作者姓名: Yan Zhao and Zhongda Chen  
  摘要:   This paper deduces the formula, which can accurately calculate settlement composed of lateral displacement based on the constant volume method model for lateral displacement of the embankment settlement. Using this formula to Lan-Xu highway measured for 1 year of settlement and lateral displacement observation data calculation result shows that the deformation of road embankment includes vertical settlement and lateral displacement virtually in the period of construction;the lateral displacement of the settlement accounts for about 20% of the total settlement; the lateral displacement settlement is not instantaneous; the process can continue for a long time;in the settlement model subsidence prediction, full consideration should be given of lateral displacement.  
  关键词: highway;embankment; Settlement model; lateral displacement  
  下载:         下载 [6 ]  
  vol   1 (1)  :434
 
   55. A Meta-Level K-Means Method for Evaluating the Advertising Value of Urban Roads
    作者姓名: Zhenyu Shan, Yingjie Xia, Kuang Li, and Xingmin Shi  
  摘要:   In recent decades there has been an increasing number of cars and other vehicles in cities which have lead to traffic congestion. The opportunity for people to see roadside billboards has also increased. As a result billboard advertising has become valuable advertising instrument for advertisers. It is a daunting workload to calculate the times drivers and passengers glance at billboards manually in a large metropolis with thousands of roads. If the probability of people looking out of vehicles is fixed, travelers who are on the roads with lower traffic speed, higher traffic density and more queuing time will have more chances to see the billboards. Considering that, we present a meta-level K-means method to automatically evaluate the advertising value of all roads in an urban region. It estimates the traffic state from the taxies’ GPS data to evaluate the road advertising value. The experiment was carried out on the real traffic data from one region in Shanghai and the result shows that the proposed method achieves the expected performance.  
  关键词: Traffic State, Advertising Value Evaluation, K-means  
  下载:         下载 [6 ]  
  vol   1 (1)  :440
 
   56. Study on the Standard of Uneven Settlement for Driving Comfort of Expressway
    作者姓名: Yan Zhao and Huan Ma  
  摘要:   There is no uniform standard in the settlement of highway construction process. The driving comfort will not be affected if non- even settlement is controlled within a certain range. In order to achieve this requirement the formation of 3-meter straightedge lar the slope caused by non- even settlement is limited to 0.47% when driving at the speed of 110km / h, road excitation wavelength is 60m, and regard this index as the non- even settlement standard for expressway. The restriction of non- even settlement is calculated and is 14.1cm according to the model. Examined by the project, this model and standard can be used for guiding the newly-built highway to subside stability controlling.  
  关键词: Non-even Settlement  
  下载:         下载 [6 ]  
  vol   1 (1)  :447
 
   57. Demand-Based Driver Distraction Quantitative Balance Model
    作者姓名: Zhizhou Wu and Junfei Jia  
  摘要:   The amount of allocated driving attention must be commensurate with the demand for attention that is imposed by the driving task under a particular driving environment. According to classifying the driving task and non-driving related tasks, we can further learn about the reason of driver distraction. Based on the principle of balance between supply and demand, under the assumed condition that the driving task and non-driving related task can be detected, we analyzed the different situation of driver distraction, and then we constructed the Driving Task Supply-Demand Strategy Model for real-time estimating the driving task demand. These variables include diver task demand (e.g., road type, driving speed, headway, turning) and non-driving related task demand (e.g., Wireless Device distraction, Vehicle-Related device distraction, Passenger-Related talking distraction, external distraction, in-vehicle objects-related distraction, Looked but did not see).  
  关键词: driver distraction; driver task demand; attention allocation; nondriving related task  
  下载:         下载 [6 ]  
  vol   1 (1)  :452
 
   58. Safety Evaluation Index of Driving Environment of Mountain Highway Based on Cluster Analysis
    作者姓名: Huiying Wen and Jinfeng Zhao  
  摘要:   According to the risk ingredients of mountain highway and the selecting principles of evaluation index, through analyzing interrelation of road facilities, natural environment and driving safety, the main factors as well as their various combinations of mountain highway driving risk were determined by using Delphi and clustering analysis methods. Then, safety evaluation index of mountain highway driving environment was established, which contained three arrangements with five sub-factors in two aspects including road environment and climate environment. And the indices were analyzed and contrasted. This method can provide a basis for the scientific safety evaluation of driving environment of mountain highway.  
  关键词: mountain highway; driving environment; safety evaluation index; clustering analysis; Delphi  
  下载:         下载 [6 ]  
  vol   1 (1)  :459
 
   59. Curved Section of Road Safety Audit Model Based on Humanization on the Mountain Two-Lane Highway
    作者姓名: Jiangang Qiao, Ying ying Wen, and Ronggui Zhou  
  摘要:   From the safety of curved section of mountain road, the paper applies medical science, psychology, traffic engineering and other theories, and combines the methods of theoretical analysis and field testing, using holter device, GPS and other equipment on the mountain two-lane highway to collect the data of running speed and driver’s heart rate. Adopting computer tools for data mining curved section of mountain two-lane highway safety operation model is established based on driver physiological responses and a new idea to prevent accident black spots on the curved section of mountain road is provided.  
  关键词: heart rate; two-lane highway; curved section; running speed  
  下载:         下载 [6 ]  
  vol   1 (1)  :466
 
   60. Projection Pursuit Methods Research of Saving Interchange Type
    作者姓名: Jiangang Qiao, Juan Li, and Min Song  
  摘要:   Interchange type is closely related with interchange function and land usage. In order to reduce land usage, under the guidance of the Projection Pursuit Methods, computer and traffic engineering theory etc. along with the actual surveys of interchange type and design parameters, on the basis of analyzing the factors influencing of various interchange type; hence the paper uses Projection Pursuit Methods to build land-saving projection indicators function. Genetic Algorithm is applied to optimize the function, and Matlab 7.0, which is statistical analysis software and is used to develop the corresponding computer program. This study proposes the optimal scheme of the saving interchange type, which will provide a theoretical basis for interchange design to save land and protect environment.  
  关键词: highlands, operating speed, combined sharp horizontal and vital curves section  
  下载:         下载 [6 ]  
  vol   1 (1)  :473
 
   61. Study on Interchange Overpass Distance Based on Maximum Entropy Principle
    作者姓名: Jiangang Qiao and Min Song  
  摘要:   In order to make the interchange overpass distance layout reasonable and save land resource, through field surveying about overpass forms, overpass distance and interchange area speed of Liaoning, and Hubei Provincial expressways, and synthetically analyzing the data, the paper uses discrete random variables which have been detected to establish maximum entropy model based on maximum entropy principle, and then construct Lagrange function; finally, get the optimal solution. Thus, the appropriate distance between interchanges have been determined and provide a theoretical basis for saving land resource.  
  关键词: entropy, overpass, spacing  
  下载:         下载 [6 ]  
  vol   1 (1)  :481
 
   62. Residents’ Travel Information Searching Behavior and Cognitive Mode Based on Travel Decision
    作者姓名: Xiaofeng Ji, Jian Xiong, and Jianshi Li  
  摘要:   The travel information searching motivation was illustrated from the perspective of travelers based on information searching theory and travel decision-making process, and was also based on drivers' travel information searching behavior model which was one of the methods proposed. On this basis, the specific factors and mechanism of travel information search behavior were analyzed, and then the traffic state information searching behavior was discussed in detail through an example network. In order to explain the cognition mode of travel information scientifically, the effects of travel information and different types of travel information environment were analyzed based on travel decision-making. The travel experience was described by establishing preferred route sets, and a log it model of travel information searching was proposed to describe the travelers' dynamic information cognitive process. The travel information cognitive mode was established initially, thus providing a theoretical basis for traffic behavior study and travel information system planning.  
  关键词: travel information; cognition model; travel decision; preference route  
  下载:         下载 [6 ]  
  vol   1 (1)  :488
 
   63. Research on Multi-Source Data Fusion Based on Loop Detector Data and FCD (Floating Car Data)
    作者姓名: Hui-Bing Li, Xiao-Guang Yang, and Hao-De Liu  
  摘要:   The use of probe vehicles to provide estimates of link travel times has been suggested as a means of obtaining travel times within signalized networks for use in advanced traveler information systems (ATIS). Previous research has shown that bias in arrival time distributions of probe vehicles will lead to a systematic bias in the sample estimate of the mean .This paper proposes a methodology for reducing the effect of this bias. Then the paper brings forward a data fusion (DF) model based on loop detector data and FCD after considering above mentioned analytical results. In the paper,VISSIM is used to simulate an urban arterial site which contains five intersections and four links, at last the paper compares different link travel times during 10:00-10:05 within one week that are respectively obtained from floating car report alone and multi-source data (loop detector data and floating car data), and it yields a satisfactory result.  
  关键词: expected delay, link travel time, data fusion(DF) model, VISSIM  
  下载:         下载 [6 ]  
  vol   1 (1)  :495
 
   64. Equivalent Conversion in Intersection Based on Vehicle Dynamic Performance
    作者姓名: Qin Shi and Wenjuan Mao  
  摘要:   Vehicle conversion coefficient is an important component for studying traffic capacity and is the foundation of both management and controlling researches on intersection. The operation characteristic of vehicle on intersections is significantly different from ordinary sections (such as lower speeds, more frequent acceleration and deceleration, etc). Besides different vehicle have different dynamic performance, which has a greater influence in traffic capacity. A new way of calculating equivalent conversion coefficient in the intersection is given which is based on the dynamic performance of vehicle, and the formula of counting the equivalent coefficient was built.  
  关键词: Vehicle Dynamic Performance  
  下载:         下载 [6 ]  
  vol   1 (1)  :502
 
   65. Evaluation of the Impacts of BRT Corridor
    作者姓名: Yueling Yao, Peng Jia, and Zhoongzhen Yang  
  摘要:   Taking BRT line in Dalian as study object, this paper evaluates the changes of traffic flow and its environmental load corresponding to several schemes of BRT lanes with micro traffic simulator. First, the capacity of BRT lane and the being removed bus routes and bus vehicles are calculated. Second, spatial model of the corresponding area is established in the Simulating Platform, and several BRT lane schemes are built in the model, then the attributes of the corresponding traffic flows are analyzed. Third, environmental load model is used to calculate the corresponding traffic environmental loads.  
  关键词: BRT, traffic simulation,environmental load  
  下载:         下载 [6 ]  
  vol   1 (1)  :512
 
   66. A Real-Time Remote Safety Monitoring System for Commercial Vehicle Operations
    作者姓名: Liang Tang, Dihua Sun, Yongfu Li, Weining Liu, Xia Liu, and Liping Fu  
  摘要:   This paper describes a GPS-based real-time remote safety monitoring system developed to address some of the critical safety issues related to commercial vehicles and buses, such as trucks, long-distance buses, expressway buses, and dangerous goods vehicles. The main idea behind the proposed system is to transform the conventional passive way of accidents management to an active way of eliminating the potential safety hazards arising in vehicle operations. Specifically, the proposed system involves equipping each fleet vehicle with an OBD (on-board device) to obtain real-time data on the vehicle’s operating state, such as position, speed and direction. The collected data are sent to the fleet operations control center through wireless communication network, which can in turn send warnings or alerts to the driver had any incorrect maneuver or impending hazards been detected. This paper provides a detailed discussion about the architecture, components, and functionality of the system. The proposed safety monitoring system has been implemented and field tested in Chongqing, China, which has demonstrated its effectiveness in gathering valuable operational data and reducing vehicle road accidents.  
  关键词: safety monitoring; commercial vehicle operation; OBD (on-board device)  
  下载:         下载 [6 ]  
  vol   1 (1)  :519
 
   67. Modeling Conflicts between Right-Turn Vehicles and Pedestrians at Signalized Intersection
    作者姓名: Yonghong Zhao, Yu Bai, and Xiaoguang Yang  
  摘要:   Few studies have been found to analyze the conflicts between right-turn vehicles and pedestrians at signalized intersections where right-turn on red is permitted. However, a better understanding of the factors that affect the likelihood of the conflicts would help provide direction for countermeasures aimed at reducing the number of crashes. This paper proposes a model to describe the relation between traffic conflicts and influencing factors with different right-turn radiuses using Poisson regression methodology. The modeling results show the impacts of traffic volume and right-turn radius on the occurrences of conflicts between right-turn vehicles and pedestrians. It is found that the increase of vehicle and pedestrian flow, will increase the number of conflicts, but will decrease the conflict rate per hundred pedestrian. Meanwhile, the number of severe conflicts at large radius is higher than that at small radius.  
  关键词: traffic conflict; signalized intersection; right-turn on red; pedestrians; right-turn vehicles  
  下载:         下载 [6 ]  
  vol   1 (1)  :529
 
   68. A Real-Time Planning Algorithm for Route Choice Behavior and Processes
    作者姓名: Feng Gao  
  摘要:   The purpose of this paper is to develop a real-time planning algorithm for making possible a more proper description of drivers? route choice behavior and processes under real time traffic information in a traffic network. The algorithm uses concepts from Decision Field Theory (DFT) and Bayesian belief network (BBN). DFT is widely known in the field of mathematical psychology and is used to study drivers' multi- attribute cognition and decision process under real time traffic information. BBN is employed to infer updating of road condition under real time traffic information. Using this algorithm, a driver develops his route dynamically until he reaches his preferred destination. The preferences of routes which are directly accessible from the current position are obtained via BBN and DFT. Critical factors that affect drivers' response to real time traffic information are quantitatively studied through interactive simulation and from the viewpoint of cognitive psychology.  
  关键词: Route choice behavior and processes; Decision Field Theory; Bayesian belief network; real time traffic information; real-time planning algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :537
 
   69. Performance Comparison of GPS Probe-Vehicle-Based Methods in Urban Traffic State Estimation
    作者姓名: Qian-kun Zhao, Qing-jie Kong, Ying-jie Xia, and Yun-cai Liu  
  摘要:   Global Positioning System (GPS)-equipped probe vehicles have been one of the principal techniques in detection of traffic flow. In order to guide the application of the different methods using data from GPS probe vehicles, this paper compares two of the most popular methods using the GPS data to estimate traffic state- the method of tracking probe vehicles, and the one of fitting the model with the sample points of probe vehicles. In the experiment, data from thousands of GPS-equipped taxies were taken as the probe vehicles, and the estimate accuracy and operation speed of the two different methods were systematically measured. For the accuracy experiment, the ground truth was obtained by replaying the videos which were shot on 24 links in Shanghai downtown. The experiment results illustrate that the tracking-based method usually bears higher estimate accuracy, and slower operation speed, compared to the model-fitting method.  
  关键词: GPS probe vehicle; GIS-T digital map; traffic state estimation; performance comparison  
  下载:         下载 [6 ]  
  vol   1 (1)  :545
 
   70. Vehicle-Pedestrian Interaction Analysis in Mixed Traffic Condition
    作者姓名: Yingying Zhang, Danya Yao, Tony Z. Qiu, and Lihui Peng  
  摘要:   The interaction between motor and non-motor traffic participators has been increasing dramatically. So far, traffic safety is always measured as the number and severities of traffic collisions which occur. Time to Collision (TTC) is one major parameter to reflect the possibility of such collisions. It can also be applied to the pedestrian involved analysis, but cannot reflect the pedestrian safety precisely. Therefore, time Difference to Collision (TDTC) is defined accordingly as a variation of TTC to describe the pedestrian-vehicle (P&V) interaction. One hundred groups of P&V interaction cases were collected. The comparison was made based on the cases between Vehicle-Pass-First (VPF) and Pedestrian-Pass-First (PPF) and among different safety scenes. The results show that the distance and speed values are obviously different from the cases between VPF and PPF, and the TDTC values are related to safety. It may provide some guidance to describe and analyze the driver-pedestrian interaction behavior. The participators’ interaction behavior can be discussed further in the future.  
  关键词: Mixed Traffic, Vehicle-Pedestrian Interaction, TTC, TDTC  
  下载:         下载 [6 ]  
  vol   1 (1)  :552
 
   71. Research on the Measures of Speed Limit on Lianhuo Highway in Xinjiang
    作者姓名: Junming Ye, Tao Liu, Yong Huang, Yan Jiang, and Min Li  
  摘要:   Reasonable approaches and values of speed restriction can decline the number of traffic accidents and reduce the severity of accidents, and improve traffic safety and operational efficiency therefore. Aiming at analyzing and studying the linear and operating characteristics as well as traffic accidents on the Lianhuo Highway in Xinjiang, this thesis has observed implementation of all kinds of speed limit measures, put forward a more reasonable speed management and control method and provided a reference and fundamental basis for highways’ design, upgrading and speed control in the future.  
  关键词: Speed restriction; Control technology; Operating characteristics; Highway  
  下载:         下载 [6 ]  
  vol   1 (1)  :560
 
   72. Variance Analysis of Factors That Affected Traffic Safety in Highway Work Zones
    作者姓名: Yanyan Zhang, Shunying Zhu, Hong Wang, Yanjie Hu, and Bing Liu  
  摘要:   Highway work zones result in descent of road capacity and traffic-jam for part of lanes closed, and all of that would create safety concern. On the basis of crashes data which classified by different factors in Virginia highway work zones, the data that work zone crash levels and entire highway crash levels are analyzed with One-way analysis of variance (ANOVA) in SPSS. The data analysis in this study involved two major steps. First, identify the prominent variable that followed too closely and other 7 significant variables. Then, the 7 significant variables, corresponding entire highway crash levels and the prominent variant form 7 triple tables. One-way ANOVA is used to identify the secondary prominent factors such as lane change, speed too fast and inattentive drive. At last, investigate all the prominent variables using Grey Relational Analysis (GRA), and distinguish the relationship between different crashes type and drive behavior. The result of this study will provide theoretical basis for work zone safety guarantee technology. Owing to long-term operation or natural disaster, highway system will appear different degree of functions reduced and facility impaired. Numbers of work zones appeared to guarantee road normal operation. The major effect of work zones is descent road capacity for lane closure, which results in traffic-jam and delay and creating safety concern. In America, more than 700 fatal crashes happened, about 24000 injury crashes and 52000 property damages only due to crashes.  
  关键词: Highway work zone; Traffic safety; One-way ANOVA; Grey Relational Analysis.  
  下载:         下载 [6 ]  
  vol   1 (1)  :567
 
   73. Application Research of Automated Overloading Monitoring System in Road Passenger Transportation
    作者姓名: Sihua Ye and Jiancong Wang  
  摘要:   Overloading can lead to major road traffic accidents, and it is a difficult point in safety management of road passenger transportation. Dynamic and effective real-time monitoring is the key in preventing and avoiding passenger vehicles from overloading, and improving safety management. This article introduces the design and application result of automated monitoring system developed by Yunfa Corp., with a detailed explanation on the choice of the passenger counting system in road passenger transportation, the principle of the passenger counting system using surveillance camera, and the method of monitoring overload as well as application results.  
  关键词: 道路客运车辆超载;智能监控;道路客运安全管理;视频运动目标识别和检测;GPS;GIS;行车记录仪  
  下载:         下载 [6 ]  
  vol   1 (1)  :575
 
   74. The Highway Design of Mountainous and the Research of Traffic Security
    作者姓名: Guosheng Zhang and Rong Zhu  
  摘要:   From the traffic security point of view, through analyzing the mountains highway design of the linear, visual problems and the subject of climate, the design of the flat curve, a vertical curve and the combination of the design is clarified on the highway. They are important influence on traffic safety. And which were given a detailed analysis by applying grey theory.  
  关键词: the highway, the traffic safety, design  
  下载:         下载 [6 ]  
  vol   1 (1)  :586
 
   75. Analysis of Contributory Factors for Drinking and Driving: A Stated Choice Approach
    作者姓名: Li-Yen Chang, Chi-Hsui Huang, Isaac I-C. Chen, and Da-Jie Lin  
  摘要:   Traffic accidents caused by drunk driving have drawn considerable attention from the general public because of the high accident risk and high risk of severe injury. During 2007 in Taiwan, there were 9,881 alcohol-related accidents which result in 395 people lost their life and 7,592 people injured. To reduce the number of drunk and driving accidents, traffic authorities have put lots of efforts to prevent people from drinking and driving including lowering the legal limit for drinking and driving, increasing the punishment for the offender, and increasing intensity of police enforcement. However, the number of alcohol-related accidents has reduced only slightly. Therefore, this study adopts stated choice experiment approach to explore the contributory factors and circumstances for drinking and driving. The results indicate that the time, level of impairment, police enforcement, driver’s drinking habit and the knowledge of drinking and driving regulations can significantly affect drivers’ choice of driving after they drink.  
  关键词: CONTRIBUTORY FACTORS, DRINKING AND DRIVING, STATED CHOICE  
  下载:         下载 [6 ]  
  vol   1 (1)  :593
 
   76. Properties of Asphalt Conductive Concrete Containing Carbon Fibers and Graphite Powder
    作者姓名: Hong Li, Li Zhu, Xiankuan Qi, Mingqing Sun, and Xiedong Zhang  
  摘要:   Using conductive asphalt concrete (CAC) as a type of electro thermal element to melt snow and ice on highways is one of the most efficient, convenient, safe and environmental conservative methods. This paper focused on the influence of components on electrical and mechanical properties on CAC. Results show that the electrical performance of CAC depends on conductive filler content, types of conductive filler, and asphalt aggregate ratio. In order to realize the function of melting snow and ice, the best method to prepare CAC is to use both graphite powder (298# scale graphite) and short carbon fibers (CF) as mixer-filler. As the asphalt aggregate ratio is 8.0, the content of graphite is 50 wt.%, and CF content is between 2.5%~4.0 wt.%, resistivity of CAC is close to or less than 102 Ω.cm. Marshall stability and flow value of CAC are also up to the national standard.  
  关键词: Conductive asphalt concrete,Resistivity,melting snow and deicing,bitumen-aggregate ratio  
  下载:         下载 [6 ]  
  vol   1 (1)  :600
 
   77. An Adaptive Load Balance Scheme for Handling Mass of Front-End Devices in Vehicular Wireless Network
    作者姓名: Wei-Hsun Lee, Yian-shu Chu, and Shian-Shyong Tseng  
  摘要:   Many ITS applications are designed based upon centralized vehicle-to-center communication scheme. The backend systems deal with the requests from the front-end devices (FED) and respond to the request information for completing applications scenarios. However, huge amount of FEDs may generate mass client requests and result in communication server bottleneck problem (CSBP). In this paper, an adaptive hierarchical load balance approach with the concepts of divide and conquer, dynamic load distribution and balancing for resolving the CSBP is proposed. A work load factor is defined for balancing the loads of communication servers to maintain the quality of service, and a fail-over procedure is automatically triggered to assign a new responsible communication server when a communication server fails. By applying the proposed method, client requests can be almost averagely distributed to the available communication servers, which reduces the probabilities of regional congestion and enhance the overall service quality.  
  关键词: adaptive load balancing, intelligent transportation system, telematics, communication server bottleneck problem  
  下载:         下载 [6 ]  
  vol   1 (1)  :608
 
   78. Research on Digital Subgrade Settlement Device and Performance Testing
    作者姓名: Xiu-guang Song, Pei-zhi Zhuang, Hong-bo Zhang, and Yang Yang  
  摘要:   With the booming of high-speed railway, highway and other infrastructure engineer-ing, traditional settlement observation devices cannot meet the increasing settlement de-formation control requirement of engineering projects. They have many serious prob-lems such as low precision of measurement, low degree of automation, and high interfe-rence of human factors. Therefore, researching and developing new observation devices with reliable function, low price, and high precision has significant meaning. According to the need of practical engineering, we have developed a new kind of digital sub grade settlement device on the basis of water tube settlement gauges in this article. This device, under the prerequisite of remaining constant volume, uses vibrating-wire transducer to measure the surface pressure difference of certain points in the liquid pipe before and after the settlement for determining their sedimentation value. Laboratory experiments of performance testing prove that its stability and durability can meet the long-term ob-servation requirements, it can achieve automatic observation, and its high precision of measurement makes sure the errors are controlled within 1mm. Therefore, this device can be widely used in the settlement observation of sub grade, important structures, dam, and river bank foundation and so on.  
  关键词: Subgrade settlement, Digital settlement device, Vibrating-wire transducer, Surface pressure difference, Performance testing.  
  下载:         下载 [6 ]  
  vol   1 (1)  :615
 
   79. Urban Road Planning: A Safety Perspective
    作者姓名: Sara Ferreira and Antonio Couto  
  摘要:   The planning process is the first stage to incorporate the safety analysis of the road urban network. This paper provides a tool that allows the analysis of the potential accident risk at urban segments using information available at road planning process. The main points decided in the planning stage - land-use and the road function classification – were used as explanatory variables. Other variables, as control variables, were included such as traffic flow, segment length, minor intersections density and time trend. Generalized linear modeling techniques were used to model accident data from Porto, Portugal. The models outcomes demonstrated that all the variables are statistically significant and according to the expectation. Using the “percentage explained” by the model it can be concluded that although the traffic flow was the strongest variable, the land-use and road function classification have improved the “percentage explained” by the model.  
  关键词: Road Accidents; Planning Process; Generalized Linear Models; Land-Use; Road Function Classification  
  下载:         下载 [6 ]  
  vol   1 (1)  :622
 
   80. Research on the Bicycle Flow in Signalized Intersections with Video-Based Detection Technologies
    作者姓名: Jin Xin Cao, Ran Liu, and Bing Li  
  摘要:   This paper aims to estimate the capacity of bicycle flow at intersections reasonably. Based on large amounts of actual traffic data collected, the cluster characteristics of bicycle traffic flow is analyzed. The IMU-LN model is established to describe the relationship between the bicycle queue length and the number of parking bicycle, and the IMU-DL model is established to describe the relationship between the queue length and the average queue density. These closed-form models can provide the queue length value and the average queue density value with a single value of input. This paper formulated a foundation of a more accurate description of bicycle flow at signalized intersections.  
  关键词: Mixed‐Traffic Flow, Signalized Intersection, Video‐Based Detection  
  下载:         下载 [6 ]  
  vol   1 (1)  :629
 
   81. Research on Public Parking Reservation System Based on SMS
    作者姓名: Qing-Feng Wang and Qing-Gang Wang  
  摘要:   This article conducts research on Public Parking Reservation System (PPRS), which provides parking reservation service for the public, in order to effectively reduce traffic volume, traffic jam and the waste of time caused by seeking parking lots which would reduces environmental pollution and energy dissipation. The article describes the data flow framework of Public Parking Reservation System (PPRS) with four main modules. The key technologies of the system implementation are analyzed deeply, including the method of extracting characteristic information from Short Message Service (SMS), detection technology of real-time parking spaces status, model of Dynamic Parking Spaces Allocation (DPSA), and pre-charge system for parking reservation. In DPSA, the objective function is minimizing the total quantity of Discontinuous Time Slot, in order to reduce difficulty of subsequent parking spaces allocation and improve the operating efficiency.  
  关键词: parking reservation; SMS; Geomagnetic Induction; DPSA  
  下载:         下载 [6 ]  
  vol   1 (1)  :636
 
   82. Building of Road Weather Monitoring and Warning System Based on Jingshen Expressway
    作者姓名: Junjun Tang  
  摘要:   From the 21st century, accompanying global industrialization and rapid development of economy, the natural environment is getting steadily worse, factors affecting public security have increased, and unexpected incidents also occur from time to time. Through analyzing road surface temperature data gathered by a mobile road surface condition detecting equipment, and considering the effects of terrains and landforms as well as climate, this study taking Jingshen expressway as representation, studies optimizing methods of road weather sites based on thermal mapping technology. On these bases, a road weather monitoring and warning system was built. The system achieves to monitor adverse weather in time, warn and provide the information service on real time. At the same time, the system is also easy to operate for engineers and managerial personnel, and is playing a positive and exemplary role for highway network alarm emergency service that Ministry of Transport is carrying out.  
  关键词: Road Weather, Monitor, Warn, Adverse Weather, System  
  下载:         下载 [6 ]  
  vol   1 (1)  :644
 
   83. Research on Queue Detection Technology Based on Video for City Road Section
    作者姓名: Hao Chu and Yongyi Li  
  摘要:   Traffic surveillance cameras are located in urban traffic network system in abundance. These videos are mainly used for public safety and traffic accident monitoring. With the increase in urban traffic congestion, the road section queue detection technology becomes the insistent demands for urban traffic management. Considering the characteristics of the surveillance cameras in city intersection area, the paper used maximum similarity matching standard method which is based on the fixed background area window to correct the deviation between the lane region in real-time image collection and the lane region in setting, then adopted the AOI region partition method for mapping the distance in video image to the actual distance, at the same time, based on the road section multi-lane queuing model analyzed the features of queuing lane. The veins’ differences between having vehicle lane and empty lane are obvious, therefore the paper selected the vein unit to express traffic vein image. Simple vein unit reflected the difference on gray level in neighborhood, and effectively reflected the veins’ differences between having vehicle lane and empty lane. After removing the noise, the empty lane region at the end of queue could be detected, and the real-time length of the road section vehicle queue can also be calculated. The validity of the algorithm is validated by checking the actual intersection video images and actual queue length data.  
  关键词: Road section queue, Real-time video detection, Traffic surveillance cameras video, Traffic conditions  
  下载:         下载 [6 ]  
  vol   1 (1)  :652
 
   84. Deicing Concrete Pavement Containing Carbon Black/Carbon Fiber Conductive Lightweight Concrete Composites
    作者姓名: Mingqing Sun, Ying Wu, Bin Li, and Xiedong Zhang  
  摘要:   The electrical and mechanical performance of carbon fiber (CF)/carbon black (CB) lightweight concrete (LWC) depends on CF content, preparation method and sand ratio. As CB content is 0.83 vol.%, CF content is more than 0.49 vol.%, and resistivity of CF/CB LWC is less than 102 Ω·cm, Compressive strength and flexural strength reach more than 30 MPa and 5 MPa, respectively. Results show that using a new type of CF mat to prepare CF/CB LWC is an effective method. An experimental pavement model set up in the field using CF/CB LWC can melt snow in real time in spite the snowfall is about 10mm/h.  
  关键词: conductive lightweight aggregate concrete; deicing pavement; electrical heating  
  下载:         下载 [6 ]  
  vol   1 (1)  :662
 
   85. International City Traffic Congestion Based on Analysis and Countermeasures Research
    作者姓名: Fei Li  
  摘要:   New York, London, Paris and Tokyo are world-class cities and suffer from have traffic congestion. This paper points out the main reason for traffic jams is incompatibility between transport planning and transport development and traffic in accordance to the physical distance of the city. Proper Classifications borrowed from the metaphor of Chinese classical culture "pie", "Gun Xiuqiu", “cutting sword "and" kite flying " are four independent and interconnected transportation planning programs. The connection between the four basic theories is an integrated transport network of a honeycomb-like group of cities which needs to be expanded. The concept of traffic should change and construction of new traffic venues to meet the new era transport on land, sea has gone in vain as the various requirements of integrated functions, using the important node of transport network, the four traffic planning programs are not appropriate for seamless integration in order to establish a network of metropolitan cellular transport systems. Borrowing from sophisticated transportation network management software, intelligent traffic management an immediate approach can be taken. The drivers of the city's various transport tools should be made user friendly so as to break from the big city traffic congestion phenomenon and to achieve the smooth flow of international big cities transport systems.  
  关键词: city; traffic congestion; one-way loop; cellular transport network  
  下载:         下载 [6 ]  
  vol   1 (1)  :669
 
   86. Study for Maintenance Assessment Method of Highway Traffic Safety Devices
    作者姓名: Wenying Su  
  摘要:   The paper focuses on the study for assessment methodology of highway traffic safety devices maintenance, including traffic signs, pavement markings, guardrails, fences and anti-glare board etc. It also discusses the advanced maintenance method and assessment technology, to supervise the performance of devices and ensure the effectiveness. In addition, for each kind of device, the author analyzes the maintenance contents, inspection items and qualification requirements by formulating the evaluation index and formula, establishing the devices proportion coefficient imperfect form and scoring standards for the purpose to score the device and assess its grade. Lastly, device performance is classified into five grades ranging from excellent, good, middle, defect to bad, and scores from 0 to 100.  
  关键词: traffic safety devices,maintenance,assessment,method,grade  
  下载:         下载 [7 ]  
  vol   1 (1)  :678
 
   87. Cause Analysis of Traffic Accidents on Road Black Spots Based on Dominance Rough Set Theory
    作者姓名: Sheng-rui Zhang, Zhen Fang, and Bin Wang  
  摘要:   This study analyzes how the number of traffic accidents can be effectively reduced by detailed study over the documented accidents. In this paper, we propose a new method called the traffic accident causes analysis based on dominance rough set theory.This method improvises on the limitations of Pawlak's rough set model in analyzing the causes of accidents, such as using discrete continuous attributes to obtain unreasonable rules. Furthermore, the paper combines facts about traffic accidents and the objective data processing ability of rough set theory. Specifically, every single cause of accidents is sorted according based on our experience and then relevant algorithms are applied to illustrate the relationship. Lastly, an example is demonstrated that shows that this method reduces the uncertainty of iscretization of continuous attributes and excludes the causes that rule against human empirical knowledge.  
  关键词: Traffic accidents; Cause Analysis; Rule Extraction; Rough Set; Dominance Relation  
  下载:         下载 [6 ]  
  vol   1 (1)  :687
 
   88. Analysis of Accident Severity on Chinese Two-Lane Rural Highways Using Multinomial Logit Model
    作者姓名: Zhuanglin Ma, Shengrui Zhang, and Jin Wang  
  摘要:   In order to identify the possible contributing factors on two-lane rural highways to accident severity, the multinomial logit model was applied to traffic accident data collected from police-reports. A total of 253 accidents, occurred on two-lane rural highways in 2007, were considered in this paper. The dependent variable is divided into three categories, namely fatal accident, injury accident, and property damage only accident, and 13 independent variables were selected in this paper. Of 13 independent variables obtained from police-reported accidents, five were significantly associated with accident severity, namely location, weather, clients’ sex, vehicle type, and accident type. The findings show that the multinomial logit model used in this paper provides a better understanding of risk factors related to two-lane rural highways.  
  关键词: traffic safety; multinomial logit model; accident severity; two-lane rural highway  
  下载:         下载 [6 ]  
  vol   1 (1)  :693
 
   89. 700A New Split Optimization Algorithm Based on a Decision Matrix
    作者姓名: Qiao Ge and Andreas Poschinger  
  摘要:   Sitraffic Motion is an adaptive network control method developed by Siemens AG, Germany. Optimizing the traffic signal is one essential feature of Sitraffic Motion. The current algorithm however is not optimized for complex signal settings and is not fully transparent. This paper develops a new optimization algorithm to overcome these problems. It is designed based on a new decision matrix to calculate the green split. The performance of this new algorithm on solving real traffic signal optimization problems is evaluated by microscopic traffic simulations in VISSIM. The comparison of the simulation results shows that the new developed algorithm has significantly improved the signal optimization for isolated intersections.  
  关键词: Split Optimization, Decision Matrix, Adaptive Traffic Signal Control  
  下载:         下载 [6 ]  
  vol   1 (1)  :700
 
   90. Research on Features of Urban and Rural Transit Flow Information
    作者姓名: Xiao-lin Tan and Hui-jian Li  
  摘要:   In order to improve the urban and rural transit network plan, it is important to find out the features of passenger flow information clearly and thoroughly. The paper not only analyses the general feature of rural passenger flow but also analyses and summarizes the features and disciplines of urban- rural passenger flow information by integrating the urban-rural passenger flow information from different counties of Beijing. Transit operators have to adjust transit service schedules according to the different demand at different time of the day, the week and the season as well as the different spatial distribution features of passenger flow. In a word, the service should be provided according to the citizens’ demand so that it can bring more convenience to the public.  
  关键词: Public transportation; Flow information; Mathematical statistics; Space analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :707
 
   91. Approach of Intelligent Traffic Signal Control for Urban Arterial Coordinate Control Based on RFID
    作者姓名: Xiuchun Xiao and Jianmin Xu  
  摘要:   The typical problems of traditional methods for urban arterial coordinate control are the system traffic efficiency can’t achieve the optimal value for the cause, the control strategy which is static and parameters are set to just strive for the maximization of traffic efficiency of arterial at the expense of the right of road that cut the arterial were pointed out in the paper and analyzed. Following the design principle of maximum green wave bandwidth and analyzing the problems of actuated control and the set of the control parameters, a new method of the arterial coordinate actuated control which is based on the RFID was presented and a model was developed to solve the control parameters, finally achieving control effect that. The examples effectively demonstrate that the improved urban arterial coordinate control system can not only make urban arterial coordinate control system get green wave bandwidth as wide as possible but also significantly improve the traffic efficiency of road which cut the arterial and reduce the average delay of the system.  
  关键词: coordinate control; actuated control; green wave bandwidth; RFID; delay  
  下载:         下载 [6 ]  
  vol   1 (1)  :715
 
   92. Improved Vehicle One-Dimensional Collision Accident Analysis Models Based on the Finite Element Theory
    作者姓名: Yangshan Tang and Fengjiao Wang  
  摘要:   Based on vehicle collision accident models which were established according to momentum theorem, the aim at the accuracy problem of traffic accident collision speed calculation and analysis is done using finite element simulation technology. The factors for calculation of traffic accident are the key points are deformation, combining the collision theory that had been established. The vehicle collision accident is an improved model which is researched to determine the method by calculating the back stepping of vehicle one-dimensional collision accident model speed, then working out the speed before vehicle collision.  
  关键词: 一维碰撞模型;有限元;碰撞速度;变形量  
  下载:         下载 [6 ]  
  vol   1 (1)  :723
 
   93. Model of Traffic Accidents Influence Area on Urban Road
    作者姓名: Yulong Pei, Chuanyun Fu, and Liwei Hu  
  摘要:   The influence area of urban road traffic accident is studied in order to take effective measures for reducing the impact. On the basis of analyzing that traffic accident impacts on road network, the accident effect includes two processes of vehicle queue formation and queue dissipation, the relationship of them belongs to inclusion relation on the time dimension. According to the loss of traffic capacity during the period of handling traffic accident, congestion traffic volume caused by accident is defined. The instantaneous line source diffusion plume model is introduced to establish the maximum impact distance model of roads connecting with accident point. The model is used to determine the influence area of urban road traffic accident. The maximum impact distance model is illustrated through an example. The research result shows that influence area determined by this model is consistent with the actual situation, which can provide the basis for traffic department to take timely control measures.  
  关键词: road traffic accidents; plume model; traffic accidents influence area; traffic capacity; congestion traffic volume  
  下载:         下载 [6 ]  
  vol   1 (1)  :729
 
   94. Research on Method of Speed Limit in Urbanization Road
    作者姓名: Liping Zhao, Jinliang Xu, Hongzhi Yang, and Chen Zhao  
  摘要:   The method and standard of speed limit in urbanization road is proposed for the mixed traffic circumstances. Based on the survey data, the calculation model of transverse interference and the model of relationship of transverse interference and operating speed are put forward through analyzing the traffic characteristics on urbanization road. On this basis, the method and standard of speed limit in urbanization road is presented. The key design parameters such as the minimum length and spacing of speed zone are defined on the basis of psychological requirements of drivers and the operation of the vehicles. The project case shows that the method of speed limit can effectively decrease the operating speed and greatly improve the road safety, which provides the basis for vehicle speed management in urbanization road.  
  关键词: urbanization road; transverse interference; operating speed; speed limit; speed zone  
  下载:         下载 [6 ]  
  vol   1 (1)  :738
 
   95. A New Microscopic Traffic Model and Simulation Based on CA Conceptions
    作者姓名: Fan Yang and Xiaoguang Yang  
  摘要:   A new microscopic traffic model for one-lane traffic flow, based on some Cellular Automation (CA) conceptions such as acceleration, deceleration, randomization deceleration, and movement, is presented in this paper. Though NaSch Model and other improvement models, as KKW model, VDR model, had described traffic flow trajectory, more real impacts should be mentioned to depict the trajectory more precisely. Without accurate information about vehicles location and velocity, the parameters as volume, density cannot be obtained. Thus, traditional CA models can analyze some macroscopic traffic phenomena, as synchronized flow for example, but it results in the lack of microscopic traffic flow analysis since some traffic flow characteristic are not included in models. Some real conditions of vehicles and drivers, such as vehicle acceleration and drivers reflection to prior vehicles, are considered in this model which does not exist in CA models. The spatial-time trajectory is used to analyze traffic flow characteristic and traffic situations in numeral experiments. The results show that the new model can depict traffic moving more precisely and can be used to analyze traffic flow quantitatively.  
  关键词: CA; spatial-time trajectory; microscopic traffic flow  
  下载:         下载 [6 ]  
  vol   1 (1)  :747
 
   96. Intelligent Transport System Standardization Research
    作者姓名: Ning Chen and Fei Tan  
  摘要:   The international standardization of intelligent transport system (ITS) has entered an in-depth study stage, but the domestic standardized work of ITS domain is not yet started. In order to ensure interoperability and compatibility, to guide and standardize the development of the industry, an ITS standard architecture should be set up. The paper introduces the background and a clear necessary of ITS standardization, and analyses the domestic and foreign ITS standardization research present situation, and gives ITS standardization basic principle, and presents the total structure and the key factors of ITS standard architecture.  
  关键词: Intelligent Transport System (ITS); Standardization; Architecture  
  下载:         下载 [6 ]  
  vol   1 (1)  :755
 
   97. Application Data Mining Technology in Identifying and Analyzing Decision-Making on the Road Black Spot
    作者姓名: Hao Wu  
  摘要:   It establishes a suit of system of identifying and analyzing decision-makings on the road black spot, and raises a method of identifying the road black spot based on DBSCAN algorithm concerning the consistency clustering analysis, then makes use of an improved APRIORI algorithm in reference to the association rule to analyze the data. Subsequently it proposes a new data mining model of the road traffic accident to find the potential valuable and relational laws, which can offer important references to institute practicality fathering schemes and defending measures.  
  关键词: Road black spot, Data mining  
  下载:         下载 [6 ]  
  vol   1 (1)  :762
 
   98. A Study on Comprehensive Evaluation of Road Transportation Safety Based on Grey Relational Grade
    作者姓名: Hangjun Gong  
  摘要:   The paper aims to carry out safety comprehensive evaluation as one of effective means to reduce traffic accidents, especially serious accidents. The multilevel index system of road transportation enterprises was constructed by analytical hierarchyprocess (AHP) based on the investigation circumstances of safety status. The model also analyses various factors affecting safety in road transportation enterprises.Confirmed weight value of each index by grey relational grade, index of evaluation factors could be quantified and digitized by the method of average value analysis.The comprehensive evaluation mathematics model of road transportation enterprises is established. Traffic accidents could be prevented and decreased if fuzzy comprehensive evaluation is applied to road transportation enterprises. Road traffic accident has become a serious threat to people when they enjoy the convenient and efficient road traffic service. Therefore, it is necessary to establish a safety comprehensive evaluations index system of road transportation enterprise which conforms to our domestic situation. This paper establishes a model of road transportation enterprise production safety comprehensive evaluation and analyzes examples based on grey system theory and fuzzy comprehensive theory.  
  关键词: 交通工程;道路运输企业;灰色关联;模型  
  下载:         下载 [6 ]  
  vol   1 (1)  :770
 
   99. Analysis on the Severity Degree of Risky Driving Behaviors Based on Modified Entropy Method
    作者姓名: Yu-long Pei and Wei-Wei Qi  
  摘要:   According to the statistics, 70 percent of traffic accidents are caused by factitious factors in China. Risky driving behaviors have become the prominently adverse factors to the urban traffic safety. The severity degree index system of risky driving behaviors is proposed from the perspective of risk, universality and controllability. And the modified entropy evaluation model is applied to evaluate the severity degree for 10 species of risky driving behaviors on urban road. Finally, a comprehensive assessment scoring and sorting of the severity for the risky driving behaviors is obtained. The research results show that the severity degree scoring of risky merging and violation for signs & markings is 0.7513 and 0.2426 respectively, and scoring of the two driving behaviors is the highest and lowest respectively in the study objects. Moreover, the research results provide a theoretical basis for management and punishment of risky driving behaviors on urban road.  
  关键词: risky driving behaviors; severity degree; modified entropy method; urban road  
  下载:         下载 [6 ]  
  vol   1 (1)  :778
 
   100. Validity of Integrated Signal Control Strategy on Urban Expressways with Three Different Ramp Lengths
    作者姓名: Runmin Xu, Yuelong Su, Danya Yao, Haizheng Zhang, and Lihui Peng  
  摘要:   This paper studies the validity of integrated signal control strategy on urban expressway and compares its efficiency with other three control strategies. Three traffic simulation models about ramp networks have been built in VISSIM 4.3 in order to test the efficiencies of those signal control strategies under different traffic conditions. Moreover, 6 different traffic flow states were set in each model and the comprehensive evaluation of each strategy is proposed.  
  关键词: integrated traffic signal control strategy, urban expressway, ramp  
  下载:         下载 [6 ]  
  vol   1 (1)  :786
 
   101. Optimized Dispatch of Expressway Block Removal and Rescue Resources Based on Genetic Algorithms
    作者姓名: Can Chai, Xi-Ying Wang, and Jian-Hua Guo  
  摘要:   An optimal resource dispatching model for expressway block removal and rescue based on potential accidents is proposed in this paper, in which the dispatch decision time is selected as the weight for each road segment according to the severity of potential accidents and can be modified based on the operating characteristics of different types of rescuing vehicles. The proposed model can handle the impact of the severity of accidents upon the rescuing efficiency and the differences in dispatching different types of rescuing vehicles. Genetic algorithm is used to solve the multi-level dispatching problem under the condition of multiple accidents and rescuing resource requirements and hence generate the optimal resources dispatching strategy. Empirical results on the expressway network in Nanjing province show that with the increase of traffic accidents, rescue depots, and the variety and amount of required resources, the proposed model can generate an optimal rescuing resources dispatching strategy, demonstrating the applicability of the proposed model in real world expressway network.  
  关键词: Expressway, road-block removal, Rescue, accident, genetic algorithm, optimal dispatching  
  下载:         下载 [6 ]  
  vol   1 (1)  :802
 
   102. Applying GIS-Based Traditional Travel Demand Model for Improved Network-Wide Traffic Estimation: New Brunswick Case Study
    作者姓名: Riad Mustafa and Ming Zhong  
  摘要:   Traffic volume counts are used by many Departments of Transportation in planning, traffic operations, and asset management programs. Traditionally, four-step model (FSM) is based on traffic analysis zones (TAZs) structure which conveniently uses existing census geography to take advantage of demographic data available from Statistics Canada. This coarse zone structure tends to exaggerate the intra-zone trips resulting in biased and unbalanced trip distribution over roadway network and high estimation errors. Also, estimation of traffic volumes on low-class roads is ignored in most cases. Limitations above have necessitated developing a GIS-based high-fidelity travel demand model (HFTDM) capable of achieving network-wide traffic volume estimation with improved accuracy. This will require using all functional class roadway network and spatially disaggregating census-based coarse TAZ structure into grid-based fine zones based on road density areal interpolation technique. Preliminary results from a case study developed for Beresford area in the Canadian Province of New Brunswick show that the proposed methodology is promising.  
  关键词: Network-wide Traffic Estimation  
  下载:         下载 [6 ]  
  vol   1 (1)  :816
 
   103. Urban Traffic Emergency Management Response to Abnormal Incidents
    作者姓名: Zhaosheng Yang and Chunrong Liu  
  摘要:   On the basis of the concept of abnormal incidents, a detailed analysis of the influences on the state of urban traffic was introduced. Based on the characteristics of urban traffic under abnormal incidents, the principles of emergency evacuation strategy to be followed were set, and then, emergency evacuation plan development process and emergency management organization process were proposed. Finally, in order to improve traffic management as well as decrease the loss, the lack of existing conditions disposing abnormal incidents was analyzed and the content to be further built was put forward, which is essential for protecting urban safety and social stability.  
  关键词: traffic engineering; urban traffic; abnormal incidents; emergency management  
  下载:         下载 [6 ]  
  vol   1 (1)  :823
 
   104. Modeling Speeds and Accidents on Urban Streets
    作者姓名: Hagen Schueller  
  摘要:   This paper presents the main results from modeling relationships between road design, and speed behavior as well as the influence of speed in the occurrence of accidents. In order to describe speed choice of drivers by using parameters of the speed distribution different kinds of classification of free-flow-vehicles were analyzed as well as spatial and temporal aspects of spot speed measurements. Results of multiple regression models for mean speeds and 85-percentiles of the speed distribution are documented and discussed. Road classification, cross section characteristics, land-use and the road surface condition among others are found to be significant parameters that correlate with driving speed. Generalized Linear Models are used to describe the influence of mean speeds on the occurrence of road accidents. This is done for different accident groups under consideration of the annual daily traffic and a parameter that describes the length and type of land-use of the adjacent buildings next to the road section. The relationship between speed and accidents count is described using a power function.  
  关键词: driving speeds, urban road safety, speed prediction models, accident prediction models, generalized linear modeling  
  下载:         下载 [6 ]  
  vol   1 (1)  :830
 
   105. Pedestrian Simulation Research of Multi-Mode Transfer Terminals
    作者姓名: Guanghou Zhang, Yanyan Chen, and Dechang Wu  
  摘要:   In order to combine kinds of transportation, some super multi-mode were built. However, because of lacking of a comprehensive understand about the traffic characteristics of transfer pedestrian and dynamic evaluation procedure, inconvenience, and congestion are common problems in multi-mode terminals. Thus, investigations were conducted in multi-mode terminals in Beijing. And pedestrian traffic characteristics, such as the walking speed on different facilities, the service ability of different facilities and the walking behavior, were analyzed. With results mentioned above, a simulation model of a building multi-mode terminal was built and calibrated with Legion. At last, simulation results were used to illustrate how to conduct a dynamic evaluation of facility design of multi-mode terminal.  
  关键词: Pedestrian Simulation  
  下载:         下载 [6 ]  
  vol   1 (1)  :837
 
   106. Mathematical Models and Applicable Technologies to Forecast, Analyze, and Optimize Quality and Risks for Complex Systems
    作者姓名: Andrey Kostogryzov, Vladimir Krylov, Andrey Nistratov, George Nistratov, Vladimir Popov, and Pavel Stepanov  
  摘要:   Mathematical models, supporting software tools and applicable technologies that are accessible to wide use, are offered. The criteria and mathematical statements of problems to forecast analyze and optimize quality and risks are formulated. It can be used in system life cycle to form system requirements, compare different processes, substantiate technical decisions, adjust technological parameters, and improve system operation, increase efficiency. The users can prove answers on system engineering questions: ?Is expected quality achievable? ?, ?How much safe are these or others scenarios? ?, ?What about the real risks, profits and possible damages? ?, ?What choice is rational? ?, ?What measures are more effective? ? etc. On the base of the offered models and technologies the best decisions may be found before critical events. Preventive effective measures may be used in time. Some examples demonstrate practical possibilities.  
  关键词: methods, optimization, quality, risk, system  
  下载:         下载 [6 ]  
  vol   1 (1)  :845
 
   107. Study on Slow Traffic Priority at Signalized Intersections
    作者姓名: Xin Chen, Yuanyuan Zhang, and Enqing Zhang  
  摘要:   The slow traffic is composed by walking and bike driving with fast start and slow speed characteristics. That the slow traffic and vehicle flow are driving at the same time will cause traffic confusion. The proper implementations of the slow traffic priority will be to improve safety and traffic efficiency at the signalized intersections. In this paper, the current problems of slow traffic are analyzed. Combined with the analysis of geometric characteristics of different types of intersections, the principles and implementation conditions of slow traffic priority are proposed at the signalized intersections. From two aspects of the space and time priority research, the measures of slow traffic priority are proposed at the signalized intersections. Slow traffic priority signal timing design flow is proposed.  
  关键词: Slow Traffic; Priority; Channelization; Signal Control of Slow Traffic Priority  
  下载:         下载 [6 ]  
  vol   1 (1)  :855
 
   108. Study on the Assessment of Highway Traffic Risk in Hail Storm Weather
    作者姓名: Wei Wang, Chao Zhou, and Xin Du  
  摘要:   Hail storm is a disaster weather of making huge destructivity. The paper analyzed the main factors of the traffic risk in hail storm weather, such as the reduction of visibility owing to the damage of windshield, the impacts on the movement by the hailstones on the highway surface, and the sideslip of the vehicles caused by the rain. The author utilized a simulation method to analyze the degree of the damage of cars’ windshields by the hailstones in different diameters and the influence on the atmosphere visibility by the rainfall with different intensities under the various speeds of cars for determining the potential traffic risks. As the result of this study, it provided the methods of risk management on the highways under the condition of the hail weather.  
  关键词: Highway; Hail Storm; Risk Assessment; Numerical Simulation; Visibility  
  下载:         下载 [6 ]  
  vol   1 (1)  :862
 
   109. Optimization Approach of Dynamic Parking Guidance Information for Special Events
    作者姓名: Nengchao Lv, Xinping Yan, and Chaozhong Wu  
  摘要:   This paper focuses on dynamic parking guidance information optimization for highway travelers of special events. The original multi-mode traffic network is converted to a novel network by considering parking lots as dummy links; therefore shortest path can be implemented in the new network. A Bi-level programming model based on dynamic route choice and linear programming (LP) is proposed to optimize dynamic PGI. Based on travelers’ reaction to PGI, Stochastic Dynamic User Optimal (SDUO) route choice is employed as lower level model. Upper level model is a LP aiming to minimize network total travel time. The algorithm based on Discrete Particle Swarm Optimization (DPSO) and Method of Successive Average (MSA) is used for solution. The application on Milwaukee Summer fest indicates the optimization model can reduce total parking time.  
  关键词: Parking Guidance Information  
  下载:         下载 [6 ]  
  vol   1 (1)  :871
 
   110. Traffic Information Integration Based on Agent and Service Bus
    作者姓名: Wangdong Yang and Tao Wang  
  摘要:   With regards to the complexity of business systems for the transport and traffic information multi-sources and heterogeneity, achieving consensus among themselves can be an effective information integration, adoption services bus and Agent technique to build traffic information integrated model that can better solve the information integration and information decision-making. And to further explore the collaborative model of Agent based on services bus, the collaborative model based on integration of traffic information to achieve business integration and information services, and so as to build traffic information integration platform that can have a good implementation.  
  关键词: agent;information integration; service bus  
  下载:         下载 [6 ]  
  vol   1 (1)  :880
 
   111. A Hybrid Macro-Microscopic Model for Real Time Freeway Traffic Simulation
    作者姓名: Liang Shi, Li-guo Zhang, and Yang-zhou Chen  
  摘要:   Macroscopic traffic flow models play a significant role in the Intelligent Transportation Systems (ITS), especially for the urban traffic control and the dynamic traffic assignment. Two main problems limit the application of the existing traffic models. One is the traffic dynamics described by the complex nonlinear equations which are difficult to resolve in real time, and the other is that some model parameters need to be calibrated in prior. This paper presents a hybrid macroscopic and microscopic(macro-microscopic) traffic flow model of freeway traffic by extending the cell transmission model (CTM) with the real time speed dynamics. Simple supplying and demanding functions are defined to represent the traffic propagation between the upstream and downstream cell boundaries. A microscopic car-following model is integrated to specify the dynamics of the average speed in each cell. Simulation results with specific traffic data set collected from a 4–kilometre long urban freeway show the performance of the model compared to the well-known METANET model.  
  关键词: macro-microscopic model, urban freeway traffic, sending and receiving functions, CTM model,car-following model  
  下载:         下载 [6 ]  
  vol   1 (1)  :888
 
   112. A Dynamic Traffic Information System Based on VANETs
    作者姓名: Daxin Tian, Yunpeng Wang, Guangquan Lu, Guizhen Yu, and He Liu  
  摘要:   Real time traffic information is helpful to traffic management departments and the drivers. In this paper, we present a dynamic traffic information system based on vehicular ad hoc networks (VANETs) which can send real time traffic conditions to the users including traffic control center, running vehicles, traffic information providers, and so on. To support traffic data exchange among vehicles and infrastructures, the whole architecture includes the vehicle to vehicle, vehicle to infrastructure, and infrastructure to infrastructure communication. The simulation results prove that it can transmit data efficiently.  
  关键词: Traffic Information System, Vehicular Ad Hoc Networks, Wireless Broadcasting  
  下载:         下载 [6 ]  
  vol   1 (1)  :897
 
   113. Effect of Curvature Change Rate of Highway Horizontal Curve in the Path of a Vehicle
    作者姓名: Yu Lin and Jiangfeng Niu  
  摘要:   In order to reveal the influence rules of curvature change rate (CCR) of highway horizontal curve on the path of a vehicle under free flow traffic states, a driver directional control model for highway alignment safety evaluation was put forward on the basis of the preview optimal curvature model, with the introduction of the SK (S was arc length of a curve, K was curvature of the curve) horizontal alignment model. The simulation results show that when a car enters a curve, its path has a tendency to move inward the curve, while its path tends to move outward the curve as the car exits the curve. The CCR of horizontal curve has a significant impact on the vehicle path. With the same simulation speed, the smoother the deflection angle and the smaller the CCR of horizontal curve is, the smaller the lateral deviation of vehicle path, whereas the greater it will be. The CCR of horizontal curve has a significant linear positive relationship with the maximum lateral deviation of the vehicle path.  
  关键词: Vehicle Path; Curvature Change Rat; Horizontal Alignment; Geometric Design; Driving Behavior; Transportation Safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :904
 
   114. State Machine Based Clustering Algorithms in VANET
    作者姓名: Qi Wang, Jianming Hu, Yizhi Wang, and Yi Zhang  
  摘要:   Recently, Vehicular Ad Hoc Network (VANET) is becoming an important topic of Intelligent Transportation Systems (ITS). However, in urban traffic, there are a large number of vehicles; this will result in heavy load of network, which may worsen the performance of VANET. This paper proposes clustered structure, aiming at reducingdata redundant and improving network reliability. A centralized clustering algorithm based on Gur-Game is proposed, which is easy to perform while its stability is highly related to specific reward function. Then, an improved self-adaptive perception clustering method based on state machine is presented, which can work without roadside station distributed. The identity of vehicle is decided by neighboring cluster heads. This algorithm is more stable and can be suitable for various scenarios. Simulations on Paramics show the effectiveness of the above two algorithms.  
  关键词: Intelligent Transportation Systems, VANET, clustering, finite state machine, state transition  
  下载:         下载 [6 ]  
  vol   1 (1)  :913
 
   115. Improved Depot Choice Model of Underground Expressway under Capacity Restraint
    作者姓名: Yu-cong Hu, Hui-li Shang, and Min Li  
  摘要:   The object of passageways locating in the planning of urban underground expressway is to meet all needs under the given objective function within service capability. However, the existed depot choice model didn’t take into account the service capability. According to the principle of maximum depot efficiency, this paper presents an improved depot choice model under the condition of capacity restraint. Formulations are given and a numerical example is proposed to illustrate the feasibility of the improved model. The results show that the improved model can get the optimal locating of passageways which are dispersible in the whole network. So the locations can serve the demands in the maximum zone and lead the demand to transfer in space.  
  关键词: traffic engineering; depot choice model; capacity restraint; underground expressway  
  下载:         下载 [6 ]  
  vol   1 (1)  :920
 
   116. TJ-CTS: A Testbed of TongJi Cooperative Traffic System
    作者姓名: Luo-yi Huang, Xiao-guang Yang, and Rong-hua Du  
  摘要:   In 2008, an Intelligent Vehicle Infrastructure Experiment System (IVIES) based on Wi-Fi technology was built at Tongji University to test the solutions for traffic safety and environmental problems. TongJi Cooperative Traffic System (TJ-CTS) is the updated version testbed of IVIES; it has lower data communication latency and can support higher-speed test vehicles. In this paper, we present an overview of TJ-CTS. First, we present the overall system architecture of TJ-CTS. Three layers are expounded from the viewpoint of structure. Then, based on the analysis of the requirements for latency of safety applications, we present the related devices used in TJ-CTS in detail, such as the Processing Unit, GPS Receiver and Software Development Environment. Compared with IVIES, TJ-CTS have better performance and can satisfy the requirements of traffic safety researches in urban roads and expressways.  
  关键词: TJ-CTS, Testbed, System Architecture, Traffic Safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :927
 
   117. Safety Comparison of Different Transport Mode: A Fuzzy Theory Based Approach
    作者姓名: Ying Liu and Xiaonian Sun  
  摘要:   There are four major types of macro-evaluation on traffic safety traditionally adopted in China and overseas. However, as the number of influential factors of traffic safety increases, these evaluation methods are becoming less capable in practice. The introduction of Fuzzy Theory provides a new approach to this problem. This paper based on the traffic accident data of Shanghai and Suzhou has established a macro-evaluation model for assessing the safety performance of mixed transport modes, which include cars, motorcycles, gas motorcycles (LPG), electric bicycles and traditional bicycles. The model indicates that the safety performances of LPG, electric bicycles and traditional bicycles are much higher than that of cars and motorcycles. Electric bicycles and traditional bicycles have similar safety performances in the two cities. These findings set up a reference for the establisher of urban transport policies.  
  关键词: Traffic Safety; Macroscopically Evaluation; Fuzzy Theory; Mixed Traffic; Traffic Means  
  下载:         下载 [6 ]  
  vol   1 (1)  :935
 
   118. Large-Scale Bridge Structural Health Monitoring System Based on Smart Sensor Networks
    作者姓名: Minjie Xu, Qinghong Shen, Yunfeng Liu, Huaping Ding, Gencheng Yang, and Qianli Ma  
  摘要:   For structural health monitoring of large-scale bridges, the well-developed and widely-used wired structural health monitoring technologies have replaced traditional manual operations gradually, except for the difficulties in arranging cables and updating systems in practical applications. In contrast, the new developing wireless sensor network technologies for bridge structural health monitoring are easier to deploy and update, overcoming these defects that exist in the wired systems. However, in certain circumstances, the communication quality of wireless networks cannot be ensured, leading to an impact on the efficiency and reliability of system. A new heterogeneous structural health monitoring system is proposed in this paper. It has advantages over both wired and wireless health monitoring technologies. Then the paper analyzes its advantages compared to the single wired or wireless system specifically. The compositions of the heterogeneous structural health monitoring system are discussed in detail. In addition, some potential problems and corresponding solutions that may exhibit in the heterogeneous system are discussed. In practice, we have built a health monitoring system in Runyang Yangtse River Bridge, and according to the vibration data collected from anchor cable and box-girder of the bridge, the system can provide quantified information that can help in determining the structure health status of bridge, and give a warning if it is in danger.  
  关键词: structural health monitoring, large-scale bridges, smart sensor network, heterogeneous structural network  
  下载:         下载 [6 ]  
  vol   1 (1)  :942
 
   119. A Prototype Driver Assistant System Based on Millimeter-Wave Radar and Machine Vision
    作者姓名: Hui Rong, Jia He, and Wei Huang  
  摘要:   People pay more and more attention on the active safety technologies in Modern traffic. This paper develops a driving assistant system with the lane departure warning and forward collision warning functions. The system uses data fused from millimeter-waves radar and machine vision to implement detecting the front lane and vehicles ahead, to meet the requirement of accuracy, real-time and robustness in actual road environment. After analyzing information of targets ahead using for target location information, through establishing a unified coordinate system model, ROI (Region of interest) is defined according to the different candidate characteristics. Therefore, the search speed is improved greatly and the interference is reduced significantly. Finally, experiments demonstrate the feasibility of this system.  
  关键词: Lane departure warning; Forward Collision Warning; Multi-sensor information fusion; Region of interest  
  下载:         下载 [6 ]  
  vol   1 (1)  :949
 
   120. Research on the Leasing Model and Efficiency Improvement of Public Bicycles in Wuhan
    作者姓名: Meiqing Luo and Shunying Zhu  
  摘要:   The free leasing public bicycle is addition and extension of public transportation. For public bicycle traffic in Wuhan, the status is surveyed, and the characteristic of supply and demand, management mechanism, management information system and key problems of the public bicycle rental station are analyzed. Then the efficiency of public bicycle resource use is found to be influenced by bicycle resources dispensation and bicycle leased back in time as planned. Accordingly, the corresponding countermeasures are proposed, which includes the management mechanism, information system frame, and the achievement of dynamic balance between supply and demand by dispensing bicycle resources in time according to the change of supply and demand, and a dynamic resource distribution model among public bicycle rental stations is also established.  
  关键词: public bicycle; efficiency of resource; countermeasures; dynamic distribution  
  下载:         下载 [6 ]  
  vol   1 (1)  :957
 
   121. A Hierarchical Control Model for Regional Traffic Signal Coordination
    作者姓名: Huxing Zhou, Zhaosheng Yang, and Peng Gao  
  摘要:   In the traditional traffic control system, there is no coordination between different regions. This paper analyses the significance of coordination of the region boundary, brings out the condition for coordination and proposes two traffic control situation discrimination models of region boundary. After that, a dynamic hierarchical coordination control model of region boundary is proposed. Finally, a simulation test is carried out to validate the dynamic hierarchical coordination model with the help of VISSIM 4.2. Through evaluation index comparison of the traditional traffic control and the coordination model, it is concluded that the dynamic hierarchical coordination model is more efficient and produces better traffic control benefit than the traditional traffic control system.  
  关键词: Traffic control, Region boundary, Dynamic hierarchical coordination, Simulation  
  下载:         下载 [6 ]  
  vol   1 (1)  :964
 
   122. Traffic Incident Detection for Urban Arterial Road Based on Data Fusion and Learning Vector Quantization
    作者姓名: Huiying Wen and Jun Luo  
  摘要:   It is important to make the urban arterial road unobstructed, so a useful method is needed to detect the occurrence of the traffic incident before the road becomes congested. On the basis of analyzing the features of the traffic flow on urban arterial road, the model of learning vector quantization (LVQ) neural network was introduced to identify the occurrence of a traffic incident on the arterial road. The input variables came from the loop detectors on the section and the probe vehicles with GPS. Then the data fusion technology was used with LVQ. With microscopic traffic simulation software VISSIM, the simulation experiment was applied to prove the validity of this model for traffic incident detection. The results showed that the data fusion could reduce the false alarm rate. Meanwhile, the results also showed that the LVQ model had a good detection capability in traffic incident detection for urban arterial road.  
  关键词: traffic engineering; incident detection algorithm; data fusion; learning vector quantization; detection performance  
  下载:         下载 [6 ]  
  vol   1 (1)  :971
 
   123. Application of Traffic Information Publishing System in Highway Operation Management
    作者姓名: Haiyan Wang and Tingting Dai  
  摘要:   The highest goals of the highway operation and management are to minimize the road congestion and its negative effects, improve the safety and the overall mobility, and offer help in an emergency. In recent years the progress in monitoring and controlling, telecommunications and information processing and transmission of information technology, which is emphasizing "real-time" application, has greatly promoted the highway operational management. This paper summarizes the development status and features of the traffic information publishing system. It analyzes the problems of the traditional highway operation management, and discusses the service mode of the information publishing system. On the basis of existing monitoring system on the highway at current, the strategy how to apply the information publishing system to the highway operation management is suggested, which is from having one management institution and controlling a special equipment, to the situation that several management institutions and private sectors joint control variety of equipments and mechanisms.  
  关键词: Traffic Information; Publishing System; Operation Management; Application  
  下载:         下载 [6 ]  
  vol   1 (1)  :979
 
   124. Evaluating University Campus Traffic by Attribute Mathematical Recognition
    作者姓名: Xinjun Lai, Jun Li, and Zhi Yu  
  摘要:   The high traffic volume in Chinese universities brings issues including accessibility and safety, which requires careful evaluation of campus-traffic with a quantitative and qualitative method. A multilevel index system based on attribute mathematical recognition is proposed. The upper-level includes five indexes, namely efficiency, accessibility, comfort, safety and traffic calming, which are further divided into the lower-level indexes. The indexes’ weights are determined by variation coefficient method and the campus traffic level was identified by the confidence rules to avoid unreasonable estimation. A case study of Sun Yat-sen University East Campus is presented, whose travel environment was just passable in 2007 but greatly improved since 2009 after the road reconstruction and traffic regulations suggested by the authors. The evaluation accords with the opinion poll and the method is practical, rational and suitable for comparison.  
  关键词: campus traffic; evaluation system; attribute mathematical recognition; variation coefficient method; confidence rule  
  下载:         下载 [6 ]  
  vol   1 (1)  :986
 
   125. Head-Hand Tracking Based Driving Behavior Analysis in Computer Vision System
    作者姓名: Peiqun Lin, Jianmin Xu, and Sibo Huang  
  摘要:   In order to improve traffic safety and reduce traffic accidents, a real-time computer vision system is designed to identify unusual driving behaviours based on head-hand tracking. Firstly, an ellipse fitting algorithm is used to locate the steering wheel and the driver’s head in every frame of image, then the skin color model is employed to extract the driver’s hand regions, and the skeletons of the hand regions can be obtained by a chamfer distance transform algorithm. Moreover, Kalman filter is put forward to track the driver’s head and hands. Finally, a naive Bayesian classifier, whose input parameters include position, movement direction and movement speed, is used to recognize several kinds of unusual driving behaviours. An experiment with 5257 frames of image from real environments is carried out, and its results demonstrate the effectiveness of the proposed methods.  
  关键词: driving behavior analysis, head-hand tracking, ellipse fitting algorithm, skin color model, chamfer distance transform, Kalman filter, Bayesian classifier  
  下载:         下载 [6 ]  
  vol   1 (1)  :993
 
   126. A Car-Following Dynamic Model on Equilibrium
    作者姓名: Baogui Cao and Zhaosheng Yang  
  摘要:   Considering the equilibrium theory, this paper presented a new optimal velocity function (desired velocity), and discussed its formation and validity in detail. Further, we established an improved dynamic model based on the well accepted "stimulus - response" pattern. Finally, we performed parameters calibration and model validation with the experimental data. The results showed that the improved model’s theoretical simulation results are in better agreement with the experimental results in both acceleration even speed and deceleration process, without unrealistic acceleration appearance in existing car-following models.  
  关键词: desired velocity driving behavior car-following model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1002
 
   127. Guide Sign’s Visual Interference Experiment on Urban Road
    作者姓名: Zhigang Du, Xu Jiang, and Xiaodong Pan  
  摘要:   To probe into various typical environmental information's interference to guide sign's visual cognition, this article used iView X eye tracker system, based on many indoor simulation experiment, comparing guide sign of target road name with various environment information, such as billboard of a female star, billboard of a car, road landscape, sole board of guide sign, can obtain the universal cognitive interference regulation of various cognition environment. To the guide sign’s visual cognition of target road name with guide sign of non-target road name, several above environment information of visual cognition time and reaction time was menstruated, the female star billboard’s combination will spend much more time for visual cognition than the car billboard’s combination, road landscape’s combination and sole a guide sign board. So the female star’s billboard has significantly interference to driver's cognition, must be strictly restricted on guide sign’s environment, and the car billboard will increase the driving load to a certain extent, and should be carefully set, the road landscape have no significant interference to the guide sign's visual cognition, and can be widely used in road environment. Traffic guide sign can convey road name, direction and distance information, during driving process, the excessive environment information will greatly increase driver’s visual load, even lead to harmful driving behaviors or traffic accident. Nowadays Chinese standard of road traffic sign and markings (GB5768-2009) has the solid concrete regulation to the guide sign’s layout design of Chinese character, size, interval, but the regulation of information quantum or road environment are absent (Unerwood, et al 2002). Nowadays researchers concentrate on the pre-positive distance, setting content, layout design, some traffic information quantum’s visual cognition based oneye-movement experiment were carried out (Wu 2008, Du, et al. 2008) This article used iView X eye tracker system, by in-door simulated eye-movement experiment, to analyze the guide sign’s visual cognition process and determine reasonable environment information’s setting.  
  关键词: traffic engineering; guide Sign; visible interference; visible cognition; reaction time;  
  下载:         下载 [6 ]  
  vol   1 (1)  :1010
 
   128. Analysis of Level of Safety Service at T-Signalized Intersection in Beijing
    作者姓名: Hongqiao Song and Xiaokuan Yang  
  摘要:   This paper performed a study on urban signalized T-Intersection. By investigating a number of intersections to determine the motor vehicle speed, the intersection of internal conflict and so on as criterions of the level of service of safety (LOSS) evaluation criteria. This article used an urban T-Intersection in front of the west gate of Beijing University of technology as an example, analyzed the data of samples collected to evaluate the security service in the intersection and established model of the LOSS based on the conflicts between the motor vehicle and motor vehicles, motor vehicles and bicycles, motor vehicle and pedestrian. Finally, the LOSS is divided into three grades A~C and model of LOSS is applied to evaluate the security services of the intersection.  
  关键词: urban signalized T-intersection; level of service of safety(LOSS); evaluation indicator; the sample data of intersection.  
  下载:         下载 [6 ]  
  vol   1 (1)  :1019
 
   129. An Optimization Model for Large Event Emergency Commodity Distribution
    作者姓名: Chunlu Peng and Yunyun Song  
  摘要:   Nowadays more and more large-scale social events are taken place in our country, such as the 26th World Olympic Games in Beijing, the 2010 EXPO in Shanghai. During such celebrations, numerous people will be distributed in short time span and in limited areas. Once some emergency occurs, the rescue resource should be arrived as soon as possible to decrease the loss. This paper will mainly study the emergency resource scheduling problem for the large-scale events. In this paper, a two-stage model is put forward, in which the first stage will focus on the material dispatch problem and the second stage on the vehicle routing problem. In this model, the demand characters of the rescue material during the large-scale event emergency are analyzed, and then we mainly considered the scenario of one material distribution center, multi-material demand, meanwhile the variation of the material demand with the evolvement of the disaster is considered. At the end of the paper, a numerical case analysis will show that the model is appropriate for the material distribution optimization for the large-scale event emergency and disasters.  
  关键词: Material distribution optimization, two stage, larger-scale event  
  下载:         下载 [6 ]  
  vol   1 (1)  :1027
 
   130. Research on the Effectiveness Evaluation Method of Dynamic Traffic Information in UTFGS
    作者姓名: Peng Gao, Zhaosheng Yang, and Xueying Gao  
  摘要:   Traffic information has been dynamically provided by variable message signs (VMS), on-board equipment, traffic radio etc. in urban traffic flow guidance system (UTFGS) to help balance the traffic flow in the net, however, the impacts have not been well evaluated by taking the daily OD demand fluctuation in to consideration. Therefore, from discussing the impact of dynamic traffic information on driver’s choice behavior and pointing out the key factors need to be considered, the paper proposes a realistic evaluation method of dynamic traffic information in considering of OD demand fluctuation and carries out a real urban network test for a week to show the possibility that the information provided in UTFGS may lead to a increase in total travel time. To sum up, it is confirmed that dynamic traffic information provision would not be effective under regular traffic condition except at the beginning of a peak; meanwhile, the benefit arises in unusual traffic condition caused by incidents.  
  关键词: urban traffic flow guidance system, dynamic traffic information, effectiveness evaluation, route choice behavior  
  下载:         下载 [6 ]  
  vol   1 (1)  :1034
 
   131. Traffic Micro-Simulation of Urban Road Network
    作者姓名: Weiqi Wang, Wanchao Zhang, and Xiaokuan Yang  
  摘要:   The purpose of this paper is to introduce the microscopic traffic simulation software VISSIM model and theoretical basis. Based on the intersection’s peculiar forms of transportation, complex situation and the common problems, the thesis made a thorough analysis of the investigation of the existing traffic condition and systematically introduces the plane junction single point signal control timing design and traffic flow theory. The research method in this thesis is resistance simulation carried out by using software VISSIM, and proved that it can be used for real time detection and meets the requirements for practical use. The research work and the conclusion improve and optimization the traffic design scheme. The practice shows that traffic micro-simulation is the effective way of solving traffic problems. At the same time, traffic simulation has got wide applications along with the development of the computer technology and the transportation theories and produced a good social and economic benefit.  
  关键词: Intersection, Simulation, Optimization, VISSIM  
  下载:         下载 [6 ]  
  vol   1 (1)  :1042
 
   132. Research on Parameter Estimation for Small Sample Censored Data
    作者姓名: Ying Fan and Zhicheng Tian  
  摘要:   It is difficult to identify distribution types and to estimate parameters of the distribution for small sample censored data. An intelligent distribution identification model was established based on statistical learning theory and the algorithm of multi-element classifier of Support Vector Machine (SVM), and also applied to parameter estimation of small sample censored data, in order to improve the precision of traditional method. The algorithm of training based on SVM and the RBF kernel function was selected firstly; secondly, the parameters of the distributions characteristics were drawn; on the basis of these conditions, the distributions identification model and the parameter estimation model were constructed finally. The model was verified with Monte Carlo simulation method. Plenty of combinations of the numbers of training and testing data were processed to find the optimization of identification model and make it efficient. The results indicate that the new algorithm has more preferable performance in distribution type identification and parameter estimation than the traditional methods.  
  关键词: Small Sample; Censored Data; Parameter Estimation; SVM; Monte Carlo Simulation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1053
 
   133. The Value of a Statistical Life in Road Safety: Findings from a Contingent Valuation Study in Dalian, China
    作者姓名: Wen-Ge Liu and Sheng-chuan Zhao  
  摘要:   The value of a statistical life (VOSL) is an important data to evaluate the traffic safety programs. We make an empirical study to estimate VOSL from Dalian, China, using the contingent valuation method (CVM) based on two hypothetical scenarios of “a safety device” and “a safer road”. As a result, the individual characteristics that influence VOSL are classified into four categories which are the ability of payment, the ability to control risks, the ability of risk cognition and the aversion to risks. We also find that VOSL in “a safety device” scenario is from ¥0.55 million to ¥0.83 million and effected by the household income, car kilometers, the experience of running red lights and safety training. VOSL in “a safer road” scenario is from¥1.11 million to ¥1.56 million and influenced by the individual income, car kilometers, speeding experience and safety training.  
  关键词: the value of a statistical life; contingent valuation method;road safety;factor analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :1061
 
   134. Optimization Model of Multimodal Transportation Mode and Its Algorithm
    作者姓名: Xinju Liu and Hua Lin  
  摘要:   Transportation modes choice in multimodal transportation directly influences the cost of carriage of goods, time and quality of transport. Aiming at the status that multimodal transport informatization level is not high and lacks corresponding decision support system at present.the transport properties of various transportation means are analyzed, and then by contrast, get the transport mode choice basis. Depending on the technical and economic characteristics of different transport tools, for staging transportation networks, puts forward a combinatorial optimization model combined by the path selection and transport mode.By constructing a virtual transportation network, the original problem is converted to a shortest path problem with time constraint and ability constraints. First optimize the network, and then design appropriate genetic algorithm to solve it. An Example to this problem indicates that the optimization model and algorithm can greatly reduce the network complexity, and so this method is feasible and effective.  
  关键词: multimodal transportation; virtual networks; optimization model; genetic algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :1068
 
   135. A VII-Based System-Wide Ramp Metering Approach
    作者姓名: Jianhua Guo  
  摘要:   Ramp metering is a conventional approach for controlling the rate of vehicles entering a freeway network and hence mitigating the negative effects of congestions such as reduced mobility and safety. Due to the constraint of current traffic condition detection technologies, detailed traffic condition information on vehicles entering and exiting the freeway system is not available to fine-tune the process of vehicles entering the freeway system. The emerging technology of Vehicle Infrastructure Integration (VII) presents a potential opportunity of developing a system-wide ramp metering system with the ability of fine-tuning the process of the vehicles entering the freeway system and hence increasing the efficiency and safety of the vehicle merging into the freeway traffic stream. In this paper, a VII-based system-wide ramp metering algorithm is proposed to obtain the traffic condition information at vehicle-level and combine the information with the queue detection, ramp utilization, and OD information for fine-tuning the vehicle entering the freeway system. In addition, queue flush and vehicle guidance are included to minimize the possibility of onramp vehicles spilling back to the arterials.  
  关键词: Freeway control, Vehicle infrastructure integration, System-wide ramp metering, Traffic condition, Queue  
  下载:         下载 [6 ]  
  vol   1 (1)  :1076
 
   136. A Study on the Traffic Behavior and Optimization for Historic Town
    作者姓名: Wei Liu, Zhenyu Zhang, and Meng Lu  
  摘要:   Based on the analysis of traffic behavior in the historic town, this paper describes the difficulties and problems of the traffic development in the historic town. On the goal of conservation and development for historic town, the article analyses the decision-making for the development of transportation in historic town, and proposes the scope and main content of the traffic planning. According to characteristics of the historic town, the paper proposes the traffic optimization strategies and methods in the construction, including of respect for the conservation of the historic town, prevent large demolition and construction; a hierarchy of road blocks and treat them differently; respect for history, widening the street by stages; expand the scope of one-way traffic, increase the number of parking lots; promote green travel methods.  
  关键词: Historic town; transportation planning; value judgment; transport control and guide  
  下载:         下载 [6 ]  
  vol   1 (1)  :1084
 
   137. Factors Affecting Pedestrian Crossing Behaviors at Signalized Crosswalks in Urban Areas in Beijing and Singapore
    作者姓名: Nan Jiang, Mi Shi, Yilong Xiao, Kan Shi, and Barry Watson  
  摘要:   This paper reports an observation investigation of pedestrian crossing behaviors conducted at signalized crosswalks in urban areas in Singapore and Beijing on typical workdays. Each crosswalk was observed 3 times in different periods, i.e. normal hours, lunch hours, and rush hours. A total of 103,956 pedestrians were observed. The results showed that lane type, lane number, intersection type, and culture had significant effect on illegal pedestrian crossing in both cities; observation period had no significant effect on pedestrian violation in both cities; the violation rate in Singapore was lower than that in Beijing. However, observers reported that illegal crossing of vulnerable pedestrians, e.g. pregnant, the lame, old men and women, was more obvious in Singapore than that in Beijing. Evidence proved the hypothesis that the violations were related to pedestrians’ cognition of the definition of safety.  
  关键词: pedestrian, illegal behavior, signalized crosswalk, observation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1090
 
   138. An Analysis of the Resilience of Enforcement Officers through Comparative Studies
    作者姓名: Nan Jiang, Xupei Li, Shuai Hao, Yilong Xiao, Xiaoqian Liu, Ye Liu, and Kan Shi  
  摘要:   Individual resilience of enforcement officers is very important in keeping road users abiding by traffic rules. The results of this study showed: a) the level of individual resilience, the possibility to choose positive coping, the perceived positive affectivity, and the work engagement of enforcement officers were lower than those of non-enforcement officers; b) the perceived negative affectivity, the possibility to choose negative coping, and the level of work burnout of enforcement officers were higher than those of non-enforcement officers; c) individual resilience of enforcement officers and their organizational resilience had significant positive correlations with positive coping, positive affectivity, and work engagement; d) individual resilience had significant negative correlation with negative affectivity and work burnout; e) the organizational resilience had significant negative correlation with work burnout; f) the organizational resilience perceived by enforcement officers was lower than that of non-enforcement officers. This study also analyzed the stressors of enforcement officers.  
  关键词: individual resilience, organizational resilience, enforcement officers, comparison  
  下载:         下载 [6 ]  
  vol   1 (1)  :1098
 
   139. A Combination Algorithm of Freeway Traffic Automatic Incident Detection
    作者姓名: Zefang Tan and Xiaobo Lu  
  摘要:   Traditional methods to detect freeway accidents are simple in theory and practical in operation, but would usually fail to deliver high detection rates and low rates of false alarm. Scholars and researchers, both at home and abroad, are shifting their attention to complicated algorithms (such as Neural Network algorithm). Though improved effectively in theory, these algorithms are less practical, due to their massive data transfer, complicated data processing, and strict requirements for equipment. Therefore, how to build a practical algorithm that is suitable for the current freeway detection equipment and software systems, with the ability to achieve accurate detection results, has triggered a heated discussion in the field of freeway accident detection technologies. Based on the objective of lowering hardware cost and operation expenses and improving detection results, this paper offers an algorithm that combines California algorithm and filter algorithm, by grasping the change patterns of eigenvalues in each algorithm. From simulation studies it is shown that, compared with the single application of either California algorithm or filter algorithm, the combination algorithm can enhance detection rates and effectively reduce false alarm rates without increasing software or hardware expenses.  
  关键词: freeway, Incident detection, combination algorithm , California algorithm , filter algorithm.  
  下载:         下载 [6 ]  
  vol   1 (1)  :1106
 
   140. Case-Based Analysis of Age and Sex Distribution of Drivers Causing Fatal Crashes: Evidence from Florida, USA
    作者姓名: Bhuiyan M. Alam  
  摘要:   This paper investigates the age and sex distribution of at-fault drivers with respect to fatal crashes on the interstate and state highways in Florida. The study finds that the younger and older drivers of both sexes are more likely to cause fatal crashes compared to the ?average? middle-aged drivers. The female oldest (>=75 years) drivers are at highest level of vulnerability of causing fatal crashes followed by younger male drivers. The study recommends that more efficient and frequent public transit services should be provided to the older drivers, and their driving licenses should be renewed every year to ensure that they are in good physical and mental health condition to drive on the streets. Goal-based effective training and educational programs should be initiated for the younger drivers where such programs are not in place, and should be regularly monitored and evaluated to make them effective where they are in place.  
  关键词: Fatal Traffic Crashes; Younger Drivers; Older Drivers; Risk Factors  
  下载:         下载 [6 ]  
  vol   1 (1)  :1113
 
   141. Bus Priority at Intersections Based on Grey Theory Method of Drainage
    作者姓名: Youyang Wang, Wanchao Zhang, and Xiaokuan Yang  
  摘要:   Public Transportation Priority can reduce bus delays at intersections, effectively ensure the punctuality of bus, thereby increasing the level of bus service, and ease the city's traffic pressure and ensure the future sustainable development of the city of great significance. Gray evaluation method using the actual running state of the traffic signal intersection analysis, analysis and comparison of import Road bus lane on the buses before and after setting and the delayed impact of other social vehicles, and the results with the theoretical model of the signal intersection delay calculation were compared. Simulation results show that the gray evaluation method, can import Road bus lane signalized intersection before and after the delay set quantitative evaluation, and has good maneuverability and practicality.  
  关键词: Grey theory Bus Priority Drainage Method  
  下载:         下载 [6 ]  
  vol   1 (1)  :1122
 
   142. Using Finite Elements Method for Traffic Flow Analysis
    作者姓名: Amir Abbas Rassafi and Mohammad Mahdi Hajizamani  
  摘要:   Traffic flow analysis was considered as one of the main steps in transportation planning and engineering. Various methods have been developed for this purpose. Most of these methods are based on available equations in traffic engineering. Mathematical methods used for analyzing traffic flow has always been very complicated and resource consuming. In 1995, using finite elements method for analyzing traffic flow was first introduced and developed over the few years. Hence it is a new look at traffic flow analysis which still needs lots of complex equations to be solved. In 2007, for the first time, it was suggested to simulate traffic flow as a fluid; using finite elements equations in fluid mechanics (i.e. model the vehicles in the road as a fluid in a canal). Results were considerably matching the real world case studies data. In this paper which is a part of study on the finite elements methods in transportation modeling and planning, ten different routes (e.g. bridge, intersection, roundabout) in Shiraz city (one of large scale cities of Iran) have been modeled in one of fluid mechanics modeling platform. Outputs compared with real world data by some adjustment and calibration which have been made to make it possible to match data and calculate the errors. Results show acceptable errors regarding modeling traffic flow by fluid mechanics simulation platforms. Additionally, a sensitivity analysis has been performed for acquisition of each element’s role (e.g. number of lanes, maximum allowed speed and AADT) in model accuracy in Neural Network Algorithm platform.  
  关键词: Traffic Flow Analysis, Finite Elements Method, Fluid Mechanics, Neural Network Algorithms  
  下载:         下载 [6 ]  
  vol   1 (1)  :1131
 
   143. Influence of Travel Behavior on Road Safety Performance Measures on Rural Highways
    作者姓名: Giuseppe Guido, Vittorio Astarita, Vincenzo Giofré, Frank Saccomanno, and Alessandro Vitale  
  摘要:   Safety performance measures represent an increasingly more useful means for the evaluation of road safety conditions and allow the planners and the researchers to evaluate strategies apt to solve safety related problems. The main goal of this paper is to present a procedure for extracting vehicle tracking data and to use them in the estimation of safety performance in terms of a series of indicators representing interactions in real time between different pairs of vehicles belonging to the traffic stream. The context for this experiment is the measurement of safety performance at rural highways with respect to the potential for rear-end and head-on vehicle interactions. Individual vehicles are detected and tracked using a video image processing algorithm. The results of this study provide meaningful experimental indicators of potential safety problems at different rural highway locations subject to behavioral driverresponses to different traffic conditions.  
  关键词: Travel behaviour, Road safety, Video traffic detection  
  下载:         下载 [6 ]  
  vol   1 (1)  :1137
 
   144. Spatial Analysis of Individual Activity Locations and Concentration Levels in Calgary
    作者姓名: Rong Shan, Mind Zhong, and Li Li  
  摘要:   Personal travel information available from household surveys helps urban transportation planners to better capture the real world situation at a much-detailed level. Individuals have a set of periodic activities and the resources that satisfy these activities are distributed across space and time. Individuals must distribute their limited time among these activities, and transportation is used to trade time for space changing. In this study, ArcGIS is used to analyze the time and location choices of several Calgarian activities, such as work, home, education and others. In particular, GIS is used to show activity locations and concentration levels over different time of the day, and visualize individual trip chains. Study results clearly show that the location choices of the work, home, and education are consistent with underlying land use patterns of desired zones. And time of the day analysis also indicates that work-shift results in significant changes in activity concentrations over different land use zones due to their own natures. Mapping of individual trip chains also provides evidences that daily travel patterns are much more complicated than those having been modeled in the traditional aggregated models.  
  关键词: GIS, activity-based  
  下载:         下载 [6 ]  
  vol   1 (1)  :1144
 
   145. Winter Road Safety: Effects of Weather, Maintenance Operations, and Road Characteristics
    作者姓名: Taimur Usman, Liping Fu, and Luis F. Miranda-Moreno  
  摘要:   This paper presents an original modeling methodology to analyse the impact of weather conditions, maintenance operations and site-specific effects on accident occurrence. For this purpose, a unique dataset was prepared and used for model calibration. This dataset integrates different sources of data from 31 highway routes of different classes and geometric characteristics over six winter seasons (2000-2006). Different accident prediction models were then developed to identify contributing factors associated with road safety during winter seasons. Several modeling techniques were used, including the Negative Binomial (NB), generalised NB (GNB), and Poisson lognormal (PLN) model. After controlling for traffic exposure, the effect of weather, road surface conditions and site characteristics were determined. Results from different models with varied modeling schemes show a remarkably consistent association between road surface conditions and road safety.  
  关键词: Winter road safety/ Statistical models  
  下载:         下载 [6 ]  
  vol   1 (1)  :1152
 
   146. Vessel Traffic Management and Information System (VTMIS)—Integrated Simulator for Safety of Navigation Evaluation
    作者姓名: Lucjan Gucma, Maciej Gucma, Wieslaw Juszkiewicz, and Marko Perkovic  
  摘要:   The article presents possibilities of a new tool designed for risk assessment and safety of navigation evaluation. The VTMIS integrated simulator conception was designed in Maritime University of Szczecin. The era of standalone marine simulators has already passed. At present the team of fully integrated simulators could act in almost real environment. Such simulators do not require the use of very strict algorithms implementation. Opposite to that, research simulator performing task in design of ports and accident reconstruction must fulfill very strict criteria of implemented software and interactions between user and simulator. Such interaction between real different participants of the simulation in almost real environment conditions and in real time is very attractive. The article presents way of design for such simulator in hardware and software as well as expected results of researches performed on it.  
  关键词: VTMS  
  下载:         下载 [6 ]  
  vol   1 (1)  :1160
 
   147. A Wrong Way Ramp Detection System
    作者姓名: Todd Stiers and Daniel Xing  
  摘要:   A Wrong Way Ramp (WWR) detection system is described. The system is based on (i) in-ground magnetometer sensor grids which wirelessly communicate vehicle detection events to an access point; (ii) algorithms identifying wrong-way events with a high detection rate and low false alarm rate for a variety of vehicle and driver behaviors; (iii) video monitoring and notification; and (iv) Driver alerts. The system design, test issues and resolutions, and field results are presented.  
  关键词: wrong way ramp; wireless sensors; safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :1166
 
   148. A Space-Time Visualization Analysis Method for Urban Traveler Information
    作者姓名: Jianqin Zhang, Zhijie Xu, and Haiyan Wu  
  摘要:   Resident trips survey aim to find out the regular pattern of the resident trips such as the flow and direction of traveler in different space and time, the composition of transportation and traveler behavior parameters. However, the traditional methods of investigation have many shortcomings, such as not having enough samples, consuming a large amount of manpower and resources etc. In this paper, based on a large sample of mobile phone location data and geographic information system (GIS) data, a new method is designed and carried out in research of urban residents’ trips pattern. In this paper, the research related to the development of a space-time GIS for exploring individual-based data are introduced briefly. The GIS data modeling for traveler space-time path is built up, and a visualization platform for analyzing temporal-spatial behavior patterns is designed and developed based on C# and ArcGIS Engine. Through matching up space-time path with road GIS data at a certain period of time, the individual transportation can be found out, the trip frequency, trip distance and trip time-consuming per day can be acquired.  
  关键词: Traveler Information, Space-time Visualization Analysis , 3D GIS  
  下载:         下载 [6 ]  
  vol   1 (1)  :1173
 
   149. A Tool Suite for Developing and Evaluating Cooperative Driving Systems
    作者姓名: Martijn Tideman, Martijn Van Noort, and Thijs Versteegh  
  摘要:   Cooperative driving systems influence individual vehicles, either through advisory or autonomous actions, so as to optimize the collective behavior in terms of throughput, safety, fuel consumption and/or emissions. Cooperative driving systems need to function properly in a vast amount of different traffic scenarios. However, performing field-tests with physical prototypes is time-consuming, cost-intensive and potentially unsafe. This makes the development and evaluation process of cooperative driving systems a complicated activity. In order to support manufacturers and governments in dealing with these challenges, TNO has created the software package PreScan as well as the MOBYSIM tool suite. These tools form an efficient and comprehensive environment for designing and evaluating cooperative driving systems.  
  关键词: cooperative driving systems, development environment, simulation tools  
  下载:         下载 [6 ]  
  vol   1 (1)  :1182
 
   150. Highway Curve Speed Precaution System Based on VII
    作者姓名: Yunpeng Wang, Wenjuan E, Daxin Tian, Guangquan Lu, and Guizhen Yu  
  摘要:   In view of the high traffic accident rate on the highway curves,a precaution system based on Vehicle Infrastructure Integration (VII) system was proposed in order to reduce traffic accident rate on highway curve. By analyzing the system function, physical and logical framework of the system was designed. The maximum safe speed was calculated utilizing the parameters of road curvature, vehicle dynamics and the obstacle information in front of the subject vehicle. Furthermore, a risk prediction function was introduced to judge the vehicle safety state when vehicle enters into the curve and the warning information was provided to driver according to warning level. The simulation results confirm the validity of the warning algorithm of the system.  
  关键词: traffic engineering;Vehicle Infrastructure Integration;curve;speed precaution system;risk prediction  
  下载:         下载 [6 ]  
  vol   1 (1)  :1189
 
   151. A Prototype Design of Signal Phase and Timing Broadcast System in Signalized Intersections
    作者姓名: Ronghua Du, Yun Zhu, and Xiaoguang Yang  
  摘要:   The safety and efficiency of signalized intersection traffic will be effectively improved, if the drivers entering the intersections can get the signal status in time. Driving conditions optimization based on signal status can also save energy and reduce emission, energy and wear of tires and pavement. Based on joint experimental plan of net of vehicle between Tongji University and DENSO in Japan, the experimental platform of vehicle-infrastructure integration system based on Wi-Fi in Tongji was improved utilizing the WSU (Wireless Safe Unit) equipment. The equipment was based on DSRC so as to improve the real-time of information transmission. A prototype design of signal phase and timing broadcast system in signaled intersection was designed and a preliminary experimental plan of system was established too. The follow-up works, such as optimization of algorithms, determination of active area, fault-tolerant mechanism and realization of the system will be studied.  
  关键词: 智能车路;信号告知;无线通讯;DSRC;系统设计  
  下载:         下载 [6 ]  
  vol   1 (1)  :1197
 
   152. Vehicle Infrastructure Integration System for Improving Ramp Merging Safety
    作者姓名: Yunpeng Wang, Wenjuan E, Daxin Tian, Guangquan Lu, and Guizhen Yu  
  摘要:   In accordance with the traffic safety and operating characteristics during the merging process,Vehicle Infrastructure Integration (VII) system for improving ramp merging safety was established. Framework and architecture of VII experimental system were designed by analyzing its functions. Then this paper described a preliminary study on a merging control algorithm of vehicles on highways using vehicles to infrastructure communication. Simulation results indicated that a smooth reference speed trajectory for the merging vehicle could be calculated based on the control algorithm, but a rather general adaptive algorithm should be provided to avoid a two point boundary value problem in future research. This research provided an effective theory and technique support for increasing safety and decreasing traffic congestion in ramp merging area.  
  关键词: Vehicle Infrastructure Integration;ramp merging;active safety;system design;merging control algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :1205
 
   153. Understanding Novice Drivers’ Hazard Perception Skills
    作者姓名: Na Chen, Ronald R. Mourant, and Linzhen Nie  
  摘要:   Road safety has always been of great concern. A topic of interest for many years has been the driving behavior of novice drivers. The accident rates of novice drivers, especially newly licensed teens, is much higher when compared to more experienced drivers. An important reason may be that novice drivers are more likely to fail to identify hazardous situations. Hazard perception in driving is the ability to identify potential hazards on roadways. The ability for recognizing hazard scenarios depends on a driver?s mental models of various road conditions. Since November 2002, the UK has had a hazard perception element as part of their theory test to obtain a driver?s license. Many different hazard perception training programs were developed as possible ways to reduce crash risk during the past decade. The results have been encouraging. However, hazard perception is a cognitive process, which is hard to measure quantitatively. In order to better understand hazard perception ability, researchers recorded drivers? eye search and scan patterns, and drivers? reaction time to potential hazards. This research will investigate the current state and effectiveness of hazard perception research for novice drivers.  
  关键词: Road safety, Novice drivers, Hazard perception (HP), Mental model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1212
 
   154. The Space-Time Continuity of Urban Non-Motorized Travel and Traffic Safety
    作者姓名: Cheng-ming Zhu and Yan-yan Chen  
  摘要:   Non-motorized travel is the vulnerable group of urban traffic. The connotation of non-motorized travel space-time continuity is discussed. The space-time discontinuity of non-motorized travel is analyzed. The continuity has impact on traffic safety. From planning, design, management and control views along with how to improve space-time continuity level of non-motorized travel is discussed. Then the evaluation method of space-time continuity is discussed. The results show that the higher space-time continuity level of non-motorized travel will effectively improve the travel safety of non-motorized travel.  
  关键词: non-motorized travel; space-time continuity; traffic safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :1218
 
   155. Visualization Aids and Traffic Accident Reconstruction
    作者姓名: Shih Chia Wang  
  摘要:   The objective of traffic accident reconstruction is to simulate the scene and event of an accident; therefore people have an idea how did it happen. Nowadays investigators use site survey data, photos taken from the scene, injury and autopsy reports and witness transcripts to conduct their investigation. It’s difficult to integrate all these data and reconstruct the sequence of occurrence events. This article proposes an innovative method to interpret traffic accidents. Document such as site survey data, GIS data, and information from police were used. Furthermore, developing investigation techniques shall have the features of reliability and practicality that lead individual evidences to present consistent analysis result. Later on by conducting factual report verification, occurrence analysis and accident conclusion, a simulation of animation is provided for stakeholders. People will have visualization aids and know what happened and how it happened. Thus lessons learned will be provided to the public and prevent recurrence of similar accidents.  
  关键词: traffic accident reconstruction, animation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1224
 
   156. Research on Highway Safety Improvement Decisions in China
    作者姓名: Hongbo Wu and Chengcheng Tang  
  摘要:   According to the traffic crash statistics in China, the number of crashes and deaths occurring in highway crashes rank the top in the world. Improvements to highway safety has become a high priority for Chinese government and road authorities due to increasing public awareness and concern for human lives and property losses caused by traffic crashes. However, satisfying this priority in an environment of limited resources and growing fiscal constraints is difficult. Therefore, it is important to ensure that the resources available for highway safety improvements are efficiently utilized. In this paper, the methods for identifying black spots are discussed, and diagnosis process of safety problems in the black spot is constructed as well as the development of selection methods and models for safety improvement projects and locations in order to guide the decision process of allocating resources for safety improvements. Furthermore, a case study is provided to illustrate their applications.  
  关键词: Traffic Engineering; Improvement Tools; Mathematical Statistics; Crash Cost; Integer Programming  
  下载:         下载 [6 ]  
  vol   1 (1)  :1231
 
   157. TSIS-Based Evaluation of Correlation between Time in Queue and Delay at Freeway Bottlenecks
    作者姓名: Hanhui He and Jia Li  
  摘要:   This paper attempts to figure out the correlation between Travel time in queue (TIQ) and delay so that TIQ may be calculated on basis of delay values. A key point of the study was collecting data of travel time just in queue, the location and length of which are ever changing. These problems were resolved as follows: First, the microscopic simulation software developed by FHWA, namely TSIS, was used as analytical tool. The simulation model divided a freeway section into segments and an incident segment was simulated in order to analyze the queuing process from formation to discharging. Second, travel time of vehicles on each segment was calculated based on simulation output, and the segment was identified whether there had been a queue or not. TIQ and delay values were then calculated according to a given algorithm. Finally, correlation between TIQ and delay was established. This study revealed that both equations of TIQ vs. delay were linear functions during queue formation and discharging although there were differences.  
  关键词: Simulation; Queuing; Freeway Bottlenecks; Travel time; Delay  
  下载:         下载 [6 ]  
  vol   1 (1)  :1238
 
   158. A Novel Multi-Fractal Image Description Method for Complex Linear Object
    作者姓名: Shi-ru Qu, Da-qi Zhang, Li He, Wei-bin Li, and Shuang Shi  
  摘要:   Fractal geometry works well in image singularity analysis. In this paper, we describe a novel representation of linear objects in road crack images using multifractal. Firstly,we give the definition of linear objects and texture around linear objects; and then we use the distribution of texture around linear objects to represent cracks. In addition, we present a multifractal feature extraction method for linear objects. We first estimate the orientation map of textures by phase-grouping method, and then compute the discrete distribution curves of linear features in several homocentric annuluses in different scales. Our results show that the bandwidth between the maximum and zero-value point of multifractal function, ( ) is proportion to the complex of texture of linear object.  
  关键词: image description, linear object, linear geometric texture, multi-fractal, planar concentric isometry rectangle annuluses  
  下载:         下载 [6 ]  
  vol   1 (1)  :1245
 
   159. A Method for Determining Taxi Reasonable Scale Based on Floating Car Data
    作者姓名: Ji-hua Hu, Hai-ying Xie, and Guang-peng Zhong  
  摘要:   After data preprocessing, map matching, data mining for Floating Car Data (FCD) of taxi, the taxi operation information could be obtained, such as single travel time, distance, and the paths. This paper puts forward a method to conform taxi reasonable scale combining the urban taxi need to urban taxi actual operating information, including taxi demand distribution and the operating characteristics such as the average operating speed, the average operating time, average trip distance, which were excavated from the FCD. Based on FCD data for Guangzhou taxi city, the method has been verified. The results show that the method can be used to calculate the urban taxi reasonable scale, which is useful to provide the scientific basic for taxi management and traffic planning.  
  关键词: Taxi Operation;Floating Car Data;,urban taxi scale  
  下载:         下载 [6 ]  
  vol   1 (1)  :1255
 
   160. Development and Strategies for the Intelligent Transport System in China
    作者姓名: Jie Sun  
  摘要:   With the development of social economy and the growth of traffic, the adoption of the intelligent transport system will improve the utilization, safety and convenience of the road. The concept, function and the necessity of the intelligent system was discussed in detail. Its development at home and abroad was analyzed. Combined with the present situation and developing trend of China traffic and transportation, the developing strategies of the intelligent transport were put forward. Finally some suggestions were presented on the intelligent transport system and the further development of international standards in China.  
  关键词: the intelligent transport system, development, strategies  
  下载:         下载 [6 ]  
  vol   1 (1)  :1263
 
   161. Theory Model for Earthquake Emergency Shelter Choice Based on the Shortest Overall Evacuation Time
    作者姓名: Huan Cheng and Xiaokuan Yang  
  摘要:   Earthquake has serious destructive and catastrophic impact on people’s life. The most important thing after earthquake is to rescue and evacuate people to a safe place as soon as possible. Time means return of life in emergency rescue after earthquake. The critical question is how to choose shelters to ensure that overall evacuation time is the shortest. In order to make the most of a suitable evacuation plan, eight assessment indexes are proposed to quantitatively evaluate level of service of Earthquake Emergency Shelter (EES) using Analytic Hierarchy Process (AHP). Then a model for EES choice based on constrained optimization theory is provided. Its objective is to ensure that the total evacuation time is the shortest. At the same time the model comprehensively considers the choice of evacuation route.  
  关键词: Earthquake emergency, Shelter choice, Shortest evacuation time, Optimization theory with constrains  
  下载:         下载 [6 ]  
  vol   1 (1)  :1268
 
   162. Research on the Key Technologies in Collaborative Video Based Traffic Flow Detection for Small and Medium Size Cities in China
    作者姓名: Jin Xin Cao, Zhen Ying Yan, Meng Jiao Yang, and Ke Yi Zhu  
  摘要:   Current video based traffic flow detection equipments require a high position of collection and a shelter‐free scenario, which has impeded the applications for these technologies in small and medium‐sized cities in China. Realizing the facts of these cities, where there are narrower roads, fewer high buildings and more noticeable blocks on roadsides, this paper develops a novel collaborative video‐based traffic flow detection approach. In the proposed method, to obtain the precise traffic flow data and overcome the limitations on site for video detection, video detectors monitoring the same road section are placed on different height and different angle with the centerline of the road section. Experimental data is collected on different types of road sections in Hohhot. Key technologies for the proposed method are discussed in‐depth based on the statistic and comparative analysis conducted on the field data. It shows that the proposed approach can provide better precision within reasonable costs.  
  关键词: Collaborative, Video Detection, Traffic Flow, Small and Medium‐Sized  
  下载:         下载 [6 ]  
  vol   1 (1)  :1275
 
   163. Influence of Traffic Safety on Road Alignment Design
    作者姓名: Zhang Hang and Sun Teng  
  摘要:   Because of the development of national economy, the ownership of automobiles is rising rapidly, which is associated with an upward trend in traffic accidents. Road safety has become a problem which needs urgent solution. In the previous year’s traffic accident analyzed the subject factors of automobiles and drivers were given considerable attention. However, the important role of road was neglected. This paper presents the effect of alignment of road on traffic safety, pointing out that the design of road alignment directly affects the vehicle safety. An unreasonable design may lead to difficult driving conditions and even terrible traffic accidents. The factors which may influence traffic safety are analyzed from different kind of planes, vertical and combination alignment aspects. Besides, complying with the principle of “people-oriented and safety first”, a solution is provided to improve the design of the road alignment.  
  关键词: road alignment, traffic accident, traffic safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :1280
 
   164. Measuring the Target Range and Relative Velocity in UWB Radar for Automobile Applications
    作者姓名: Jong-Hun Lee, Myung-Hun Jang, and Seokjun Ko  
  摘要:   In this paper, we present the optimal parameters such as the number of coherent integration and non-coherent integration of non-coherent signal detector under the maximum relative velocity of 120km/hr. Also we propose the arc tangent frequency difference detection (FDD) algorithm for measuring the Doppler shift. The algorithm has superior capabilities in comparison with the conventional FFT method in the accuracy, the hardware complexity, and the velocity range.  
  关键词: UWB Radar, Target detection, Doppler shift, Relative Velocity, Frequency Difference Detector  
  下载:         下载 [6 ]  
  vol   1 (1)  :1286
 
   165. Research on Traffic Safety Evaluation of Expressway Based on Rough Set and RBF Neural Network
    作者姓名: Weifeng Fan, Shunfeng Guo, Yuanbo Yang, and Baoyu Shang  
  摘要:   For the current situation of expressway traffic safety, a research is conducted by applying Rough Set and RBF (Radial Basis Function) Neural Network. On the basis of the comprehensive analysis of the factors affecting expressway traffic safety, from the systematic viewpoint, an index system of expressway traffic safety evaluation is established. Firstly, the index system is classified by rough set, to clear and a definite important influential index. Then, based on the classification of the evaluation index, the comprehensive evaluation model of RBF Neural Network for expressway traffic safety is established to evaluate the traffic safety of expressway in a certain area. The result proves that this method is scientific, reasonable and feasible, which has a broad prospect of application.  
  关键词: Keywords: expressway; traffic safety; rough set; neural network; evaluation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1293
 
   166. Research on Urban Traffic Security Based on Intelligent Transportation System
    作者姓名: Hong-Bo Wang and Meng Yu  
  摘要:   With the rapid population increase and the city's rapid growth in vehicle ownership, urban traffic congestion is becoming worse. The traffic security problem especially is important. This study focuses on urban traffic safety, which is based on analyzing the present situation and the causes of traffic congestion,from the perspective of sustainable transportation, combined with the urban traffic planning theory and traffic intelligent development trends, and puts forward the traffic safety measures. Car networking (Internet of cars) is one part of Internet of things, which is equipped with electronic sensor vehicles for terminals. It connects the vehicle static or dynamic information and the information network platform through the RFID and the wireless data communication technology. Thus, it forms the network that has the function of effective supervision and comprehensive service for all vehicles. This paper uses system analysis method to optimize the urban traffic structure, improve the urban residents of travel efficiency and relieve urban traffic congestion, which is of great significance to improve the urban traffic safety.  
  关键词: intelligent transportation system, urban traffic safety, sustainable transport, Internet of cars, system analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :1303
 
   167. Macro-Level Collision Prediction Models Related to Bicycle Use
    作者姓名: Feng Wei, Ahsan Alam, and Gordon Lovegrove  
  摘要:   The growing automobile transport results in severe traffic congestion, pollution and road safety problems. Bicycling, as one of sustainable transportation mode, is encouraged in most developed countries for its attributes of convenience, low cost, non-fuel use, and zero-emissions. It is generally accepted that increasing bicycle use could improve road safety. Based on a comprehensive literature review, this paper discusses potential factors influencing bicycle use and bicycle collisions. Understanding these bicycle-related factors is useful to develop new bicycle-related Collision Prediction Models (CPMs) with generalized linear regression. These CPMs can support economic justification of much-needed major bicycle infrastructure investments, and also help policy makers to promote bicycling in an effective and economic manner. Also, a brief methodology of developing such macro-level CPMs is suggested. Based on a case study of City of Kelowna, BC, Canada, several new macro-level CPMs are proposed. Results reveal that the increase of bicycle use can lead to a decrease in total collisions despite an increase in bicycle collisions, which is consistent with the actual case. Also, the bicycle-related exposure variable, bicycle lane length, has a significantly positive relationship with dependent variables: total collision frequency. In this case, it is concluded that increasing bike lanes (on-street and off-street) can be a good measure to improve road safety. Still, aimed on the research gap, this paper identifies potential works of high interests in future.  
  关键词: Variables influencing bicycle use, Macro-level Collision Prediction Model, Generalized Linear regression  
  下载:         下载 [6 ]  
  vol   1 (1)  :1312
 
   168. Effects of Inner Dynamic Excitation of Driving Gear on Locomotive Driving Motor
    作者姓名: Jianxin Liu, Daofeng Li, Quanbao Feng, and Yifan Yan  
  摘要:   To improve running safety of locomotive by analyzing the inner dynamic excitation of driving gear, with tools of gear dynamic meshing force formulas and multi-body dynamics software SIMPACK, a dynamic model of locomotive was established, and dynamic parameters of driving motor was calculated in the curved and straight track conditions. Simulation results show that the dynamic performance of locomotive driving motor become worse and its vibration increase with the increase of excitation force under the influence of inner dynamic excitation. The vibration of driving motor was enhanced with the increase of locomotive running speed and gear rolling speed, in the curved and straight track conditions the inner dynamic excitation of driving gear has the most significant effect on the nodding vibration of driving motor.  
  关键词: driving gear, locomotive, dynamic excitation, driving motor, dynamics  
  下载:         下载 [6 ]  
  vol   1 (1)  :1324
 
   169. Research on Drivers’ Identifying Laws on Traffic Guide Signs Based on Traffic Safety
    作者姓名: Ming Jiang, Feng Li, and Rui Zhou  
  摘要:   Traffic guide signs are the most important carriers and promulgators of traffic management and the road net geographical information. The erection of the guide signs has a direct influence on driving security and traffic efficiency of the road net. In this paper the drivers’ cognitive time of traffic guide signs were gained by the special designed simulation experiment .The drivers’ identifying order on a traffic guide sign and the characteristic of indentifying graphic symbols in the traffic guide signs were achieved by descriptive statistics and difference comparison of the drivers’ cognitive time. The research shows the driver’s identifying order is from left to right and up to down. Furthermore, the graphic symbols have great influence on the cognitive time, and, this influence has a close relation with the driving behavior. At the same time the result approved that the criterion of the layout order of the information in the traffic guide signs is reasonable in Chinese national standard.  
  关键词: traffic safety, guide signs, identifying laws  
  下载:         下载 [6 ]  
  vol   1 (1)  :1335
 
   170. Application of RFID Technology in Bus Signal Priority Control at Intersections
    作者姓名: Guangsheng Jiang, Yichao Liang, and Jizhen Guan  
  摘要:   In June 2008, the bus signal priority expand engineering of traffic signal control system was put into effect in Beijing. RFID (Radio Frequency Identification) technology as the bus-vehicle detector was used widely. RFID detection technology became mature in bus signal priority control at intersections. This paper first introduces the RFID operating principle, the method of installation and the application effect of the bus signal priority. At last, this paper gave some prospects of the application of RFID that used in traffic signal control for emergency vehicles such as fire truck, emergency ambulance, traffic police vehicles, and so on.  
  关键词: RFID Technology, RFID Reader, RFID Tag,Bus signal priority  
  下载:         下载 [6 ]  
  vol   1 (1)  :1343
 
   171. A Method for Generating Schematic Maps of Traffic Information for Mobile Phones
    作者姓名: Peng Guo, Yan-ling Sun, Shou-feng Ma, and Tie-jun Cui  
  摘要:   Increasing function of mobile phone, with availability of traffic information publishing, has created a demand for techniques and methodologies that assist in the automated generation of traffic maps specifically tailored to mobile phone. This paper concerns itself with the problem of automatic generation of schematic maps for traffic information. Schematic maps are effective tools for representation information about the physical environment; they depict specific information in an abstract way. In the context of mobile mapping, schematic maps are seen as being particularly useful means of displaying transportation networks. This paper presents a method that automates the production of schematic maps of traffic information. The method takes into account road type, interesting area of user, current location of user and topologic of the road network, et.al. An implementation of the method is also presented, together with experimental results.  
  关键词: traffic information; schematic map; mobile phone  
  下载:         下载 [6 ]  
  vol   1 (1)  :1350
 
   172. Human Error Analysis of Mid-Air Collision of Brazil Civil Aviation
    作者姓名: Rui Ma and Xiu-gan Yuan  
  摘要:   The mid-air collision of Brazil civil aviation in 2006 is a typical of accident caused by human error. We try to find out all attribute factors of the accident by reading accident report issued by CENIPA, and then analyze them with human error analysis system of China civil aviation (CN-HFACS) which is improved from HFACS to fit China civil aviation status. The ultimate cause of the accident is: 1) the N600XL crew’s lack of adequate preparation of the flight, unfamiliarity with the aircraft and its avionics, 2) operation violation of ATCOs, poor ATC and English language skills. The contributing cause is lack of adequate management of civil aviation administration. To improve civil aviation safety, human factor education and human error research must continue to be strengthened.  
  关键词: aviation accident; mid-air collision; human factors; CN-HFACS  
  下载:         下载 [6 ]  
  vol   1 (1)  :1358
 
   173. Traffic Organization of Freeway Trumpet Interchange Reconstruction and Expansion with All Ramps Unimpeded
    作者姓名: Guangyao Huang, Hong Wang, Shunying Zhu, Bing Liu, and Jiajun Ding  
  摘要:   Trumpet interchange is one of the most common types of interchange in the four-lane freeway and it is critical to organize traffic effectively during the reconstruction of it. The difficulties and key issues in traffic organization during reconstruction and expansion project of trumpet interchanges can be found out by analyzing the layout of ramps, traffic characteristics, reconstruction and expansion schemes and main construction technologies. Based on the idea of all ramps unimpeded, the general principles and methods of traffic organization of the trumpet interchange reconstruction and expansion project are put forward by considering the traffic characteristics, traffic volumes, reconstruction design proposals and construction period. The traffic organization during the trumpet interchange reconstruction and expansion project in Hohhot-Baotou freeway is analyzed, which may provide a useful reference for the traffic organization of the trumpet interchange reconstruction and expansion project in future. Trumpet interchange is one of the most common types of interchange in the freeway in our country, featured with simple form and only one Overpass Bridge and centralized toll stations. Taking Hohhot-Baotou freeway as an example, it has thirteen interchanges along 207 kilometers in length. Nine of them are trumpet interchange, which account for seventy percents. As the relation of the locations between the newly designed ramps and the old ones are complex, the quantities are large, the quantities of structures are immense and it’s hard to arrange the construction units, the trumpet interchange reconstruction and expansion project has a serious impact on the safety and smooth flow of traffic. Working out a reasonable plan of traffic organization during the construction of trumpet interchange reconstruction and expansion, could avoid traffic congestion and accidents. It could also make sure the good process of the project and reduce the bad effect on the society and economic.  
  关键词: freeway, reconstruction and expansion project, traffic organization, trumpet interchange, all ramps unimpeded  
  下载:         下载 [6 ]  
  vol   1 (1)  :1364
 
   174. Music Male and Female Drivers’ Behaviours when Performing In-Vehicle Auditory Tasks
    作者姓名: Yan Yang, Mike McDonald, and Pengjun Zheng  
  摘要:   A research was conducted to observe the gender difference in drivers’ behaviour while performing different-level auditory tasks in real driving situations using an Instrumented Vehicle (IV). The results showed that, as the task demand increases, there is a corresponding increase in subjective rating and a decrease in secondary task performance. Female drivers tend to adopt a conservative strategy both in baseline driving and to cope with the extra demand from the secondary tasks by driving at lower speed and putting less effort on paying attention to keep to a constant speed. The gender difference is more pronounced when the task level is higher, with females making more mistakes in performing the secondary tasks, and in having more large steering turn. This may suggest that the females’ driving performance is impaired at higher secondary task levels. As can be seen from the results, performing auditory secondary tasks while driving can impact negatively on both genders in terms of the subjective workload, secondary task performance, and primary driving performance - but to different extents.  
  关键词: Gender difference, Driving behaviour, Visual behaviour, Distraction  
  下载:         下载 [6 ]  
  vol   1 (1)  :1373
 
   175. Rationality Research on the Traffic Connection of Urban Integrated Passenger Transportation Hub Based on Multivariate Analysis
    作者姓名: Liang-jun Ma, Pei-lin Zhang, and Zhichao Nie  
  摘要:   The rationality of traffic connection in multiple transportation mode of urban passenger transportation hub is an important guarantee for the development of urban integrated transportation. The location of existing and planning integrated hub as well as the complexity of passenger traffic characteristics and hub spatial structure is also important. Considering the different connection mode and overcoming the defects of existing evaluation model, it can be easy to establish an improved model of comprehensive evaluation with multiple factors such as passenger satisfaction, transfer time and space economy, transfer equipment adaptation, etc. Then evaluating and demonstrating the rationality of traffic connection in Wuhan integrated passenger transportation hub is taken as an example. Afterwards the improvement measures are provided for the irrationality.  
  关键词: Integrated Passenger Transportation Hub, Traffic Connection, Multivariate Analysis.  
  下载:         下载 [6 ]  
  vol   1 (1)  :1383
 
   176. Study of Diversion Point Settings Based on Tolerance and Satisfaction in Freeway Reconstruction and Expansion Project
    作者姓名: Duo-jie Zhang, Shun-ying Zhu, Hong Wang, and Quan Min  
  摘要:   Setting diversion point properly is the key to make the traffic organization and design proposal of road net diversion in reconstruction and expansion Project of freeway. Different functions of multistage diversion points in reconstruction and expansion project of highway are expatiated. According to the functions of diversion point at all levels, the node-sets which are used as diversion point are identified. Considering aspects of diverting conditions and driver’s satisfaction, tolerance, diverted routing factor, and bypass cost are selected as analysis index. The necessity of diversion point settings are judged by using dynamic comprehensive evaluation method, the detailed proposal of multistage diversion point settings is obtained. Finally, setting multistage diversion point of hubao freeway reconstruction and expansion project is taken as an example for analyzing.  
  关键词: Reconstruction and Expansion Project; traffic organization;diversion point; tolerance; diverted routing factor;  
  下载:         下载 [6 ]  
  vol   1 (1)  :1391
 
   177. Study of Coordinated Scheduling and Optimization Based on Public Transport Hub
    作者姓名: Yan-yan Chen, Qi-hua Tian, Guang-hou Zhang, and De-cang Wu  
  摘要:   The optimization method of regional scheduling based on the hub point in transit network is proposed by analyzing the current public transport scheduling problems and the development trend of regional transit. Through the set of the network edge and node property value, the highest number of bus line reaching node at the same time within the permissible error is the objective function; heuristic algorithm is used to solve the departure time and the time in station at each node of frequency for each line. Because all lines coordinated arriving, the transfer time of lines running on the network for passengers decreases. The total transfer cost of main nodes is reduced to achieve the transfer optimization of lines in the public transport network.  
  关键词: Key Words: Public Transit Scheduling Genetic Algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :1399
 
   178. Bridges Loading Course Stochastic Process Model
    作者姓名: Hong-bing Zhu and Xiu Li  
  摘要:   Loading course of structure bearing is very important for it’s fatigue analysis during structural evaluation era. Based on the traffic investigation during several years, a traffic increasing stochastic process forecast model of highway was established using grey system theory and Markov chains theory. The inspection result to the model indicated that the model had a high precision and it can be used to forecast the traffic condition of future years. Vehicles weight data of a highway during 2 years by continual weighting. The vehicle weight data were fitted by traditional distributing, and the result indicated that the data accordance with double exponent distributing. Bridges loading course stochastic process model were achieved by combining above model. Vehicle numbers in certain weight area through the bridge during a certain period can be calculated. As a result, fatigue accumulation during the bridge’s service life can be calculated by the model.  
  关键词: fatigue analysis, loading course, traffic investigation, grey system theory,Markov Chains theory  
  下载:         下载 [6 ]  
  vol   1 (1)  :1406
 
   179. Research on Personal Trip Guiding System of Map Service Based on Interactive Mobile WebGIS
    作者姓名: Hongbo Wu, Xiao Feng, Wei Li, Hongyu Zhou, and Caixia Yu  
  摘要:   The 3G communication protocol and 3G intelligence mobile phone with a high speed data transmission provides a new platform and means for improvement of map service mode. With the urban transportation system more complex, demands for querying destinations and paths based on a map in trip become more frequent and various: such as foothold positions, locations of commercial service facilities that in an definite range and possible path, etc. Based on a summary of function and problem of existing mobile GIS service systems, we try a new interactive mobile WebGIS mode of personal trip guiding service, based on 3G communication platform and a latest protocol (W3C). It takes a new "request-analysis-service" personal trip service mode, which is based on a kind of vector data communication. According to personal trip problems the servers can generate a map services to meet the needs of demand, only with a few amount of data. User can get a simplified vector map and relative information of a definite problem on the screen.  
  关键词: WebGIS;3G移动通信;交互式地图服务;出行引导  
  下载:         下载 [6 ]  
  vol   1 (1)  :1411
 
   180. Research on Urban Expressway Traffic Data Mining System and Its Application
    作者姓名: Lin Yu, Zhenxing Pan, Xiao Gao, and Feng Shen  
  摘要:   Existing Traffic Information Systems accumulates lot of historic records. It provides the possibility to excavate some information to discover traffic congestion mechanism. Based on the historic data accumulated in Shanghai Expressway Traffic Monitor Center, data mining system architecture is proposed. Case study shows these results help to traffic management department to deal with traffic congestion more efficiently.  
  关键词: Urban Expressway, Data Mining, Capacity Bottleneck, Traffic Event  
  下载:         下载 [6 ]  
  vol   1 (1)  :1420
 
   181. A Reasonable Methodology of Solving Traffic Analysis Zone Size Based on CELL-ID Location Technique
    作者姓名: Jianhui Lai, Yanyan Chen, and Xinhu Zhang  
  摘要:   It's well known that collecting traffic information by cell phone CEL-ID location technique-firstly get subscribers ?travel routine by analyzing and retrieving CELL-ID number uploaded by cell phone customers, then other necessary information (e.g. Origin-Destination Flow, the number of Residents and Jobs) gained after father technical processing. However, since all of these indicators are based on traffic analysis zone (TAZ) unit and restricted by the accuracy of CELL-ID location method and communication theory, the size of the traffic analysis zone has significant impact on the accuracy of indictors. For example, the relative error of the indicator will increase if the traffic analysis zone is divided too small. But if traffic analysis zone is divided too big, the trip distribution characteristic won't be presented clear. That?s why this dissertation is to contribute a reasonable methodology of solving traffic analysis zone size based on CELL-ID location technique.  
  关键词: CELL-ID; traffic analysis zone;Origin-Destination Flow  
  下载:         下载 [6 ]  
  vol   1 (1)  :1427
 
   182. Safety Evaluation of Road Traffic Facilities Based on Fuzzy AHM
    作者姓名: Shuo Liu, Lanfang Zhang, and Shouen Fang  
  摘要:   Road administrator should understand the condition of road traffic facilities to improve traffic efficiency and ensure driving security. In the paper, a new evaluation method of road traffic facilities was proposed. By using fuzzy AHM (Analytic Hierarchy Model) method in synthesis evaluation, a reasonable safety evaluation model was established. First, the index system was established by comprehensively considering all kinds of facility attributes, including target layer—safety of road traffic facility, first level layer—4 parts of road traffic facility, second level layer—eighteen relevant indexes. Then the measure to judgment matrix was built on the combination of AHM and expert evaluation. The evaluation of what level the road traffic facilities belonged to was made out by the fuzzy mathematic. The feasibility and validity of the approach were verified by an engineering practice in the end and the advantages of the method proposed in this paper were pointed out.  
  关键词: road traffic facility, AHM, fuzzy assessment, evaluation model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1437
 
   183. A Multidimensional Data Model Designed to Analyze Urban Traffic Conditions
    作者姓名: Fei-Fei Xin  
  摘要:   The popular use of traffic detectors makes it fairly easy to collect abundant data. However, how to utilize these data effectively to analyze traffic conditions becomes an urgent problem. In this article, On-line Analytical Processing (OLAP) is applied to traffic information system to solve this problem. As the core of OLAP, a multidimensional data model for traffic conditions analysis is designed, which can deal with numerous data from different viewpoints and granularities. Fundamental procedures of establishing the model are demonstrated and traffic parameters are summarized. The application of the model to “Shenzhen urban transportation simulation system” shows well applicability for traffic condition analysis.  
  关键词: OLAP, multidimensional data model, traffic condition analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :1445
 
   184. Research on Wireless Traffic Control System of Traffic Police Resources and Key Technology
    作者姓名: Qin Yong, Yuqiang Lv, Honghui Dong, Tang Kun, Miao Nie, Jianguo Wang, and Yujuan Zhang  
  摘要:   In order to achieve the optimization of traffic polices resource and flat conductor, this paper proposed idea of architecture and functional design about wireless dispatching system of traffic police resources. And it is modeling on traffic polices’ individual microscopic behavior by state automata method. It can show macro-quantitative analysis and real-time status about the work of traffic polices on duty. It constructed the optimal selection strategy on disposal of police resources under emergency by genetic algorithm which achieved the optimal scheduling of police resource. Through the running of this system in Beijing Traffic Management Command Center, it proved that both the design of this system and processing method is reasonable.  
  关键词: state automata, genetic algorithm  
  下载:         下载 [6 ]  
  vol   1 (1)  :1453
 
   185. Study on Data Fusion Model with Multi-Source Heterogeneous Traffic Data
    作者姓名: Feng-cui Qiu, En-jian Yao, Yang Yang, Xin Li, and Yi Zhang  
  摘要:   Based on the RTMS (Remote Traffic Microwave Sensor) data, FCD (floating car data) and plate number data collected from urban expressway, a travel speed estimation method based on BP (back-propagation) neural network is presented in this study.According to the spatial and temporal characteristics of traffic data, three kinds of data complement methods are respectively presented first, and then six data fusion models are established for each data missing and complement status. The input data includes average travel speed from FCD and traffic volume, spot speed, time occupancy rate from RTMS, and the output is the average travel speed estimation. In the model training phase, the travel speed calculated from plate number data is viewed as the real value. Finally,the models are examined by realistic traffic data with two evaluation indicators. The result shows that the fusion models can provide more effective and more accurate traffic information.  
  关键词: Data Fusion; Multi-Source Heterogeneous Traffic Data; BP neural network; Data complement;  
  下载:         下载 [6 ]  
  vol   1 (1)  :1462
 
   186. Some Bias in Road Safety Evaluation in Before/After Studies
    作者姓名: Regine Seidowsky, Maurice Aron, and Simon Cohen  
  摘要:   New traffic management schemes – variable speed control, managed lane operations as Hard Shoulder Running, tidal flow, dedicated bus or taxis lane are nowadays developing. Their impact on traffic safety can be computed by means of Before/After studies. In these studies, the counts of accidents which occurred in the period after and in the period before the implementation of the new scheme are examined. As some contributing factors to accidents might have changed between before and after periods - due to the general safety policy, the betterment of vehicles or of the road, it is important to identify the impact of these changes on the accident number, in order not to confound this impact (called the “time effect”) with the one of the new scheme; this time effect is identified on a “reference” site as the difference between the accident risks between the before and the after period on this reference site. There is an implicit assumption that there are no or no important structural differences between the reference and the assessed sites (in terms of infrastructure, traffic, external conditions). If it is not the case, and if the time effect varies according to the elements of the infrastructure or of the traffic patterns, the “average” time effect computed on the reference site cannot be directly used on the assessed site, due to a bias. This bias is mitigated by splitting the reference site and its traffic into traffic scenarios or into infrastructure scenarios, and by computing the time effect on each element; then those time effects are used, with the appropriate weights, on the assessed site. The impact of this breakdown on the variance of the estimation is provided. A numerical application, for a French managed lane operation, is given to illustrate the interest of the method in road safety assessment. ICTIS 2011 ? ASCE 2011 1469  
  关键词: Road safety, Assessment, Evaluation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1469
 
   187. A Stability Evaluation Based on Monitoring and Digital Analyzing for Zhangmu Ancient Landslide of China-Nepal Highway
    作者姓名: Dong Wang, Xiao Feng, Fa-xiang Yang, and Wen-tao Shang  
  摘要:   In order to evaluate the stability of an ancient landslide at ZhangMu town of China-Nepal Highway, a monitoring-based method is put forward. By means of deformation monitoring, including ground deformation, underground displacement and crack measuring, deformation information in a rainy season of this region is got and used as a marginal condition. Based upon the geological conditions, a 3D numerical simulation is set up on the base of a reasonably established finite element model. Using typical crack monitoring data, a GM (1, 1) prediction model based on grey theory prediction method is established, which accords well. Combining stability mechanical analyze, the results are useful references for the slide-slop stability study in downstream regions of BoQu river of the Himalayan southern with complex geological conditions.  
  关键词: BoQu river valley; landside monitor; finite element numerical simulation; grey forecas  
  下载:         下载 [6 ]  
  vol   1 (1)  :1477
 
   188. Study on Pedestrian Safety Evaluation and Improvement at Urban Intersections
    作者姓名: Shuling Wang, Jianyun Yang, Chaofan Hu, and Yanyan Chen  
  摘要:   Focusing on the intersections of Beijing’s central urban area, the paper studies the traffic facilities, motor vehicles volume, pedestrian volume, pedestrian traffic conflict, pedestrian traffic law violation rates and carries out survey. Based on extensive survey data and historical traffic data, the paper proofs that the major factor leading to the pedestrian traffic conflicts is pedestrian violation of the traffic law, followed by lack of reasonable facilities crossing the streets. According to the causes of the traffic accidents, the paper puts forward appropriate measures to improve pedestrian safety, including improving pedestrian traffic compliance rate, adding more crossing streets facilities for pedestrian. For quantitative evaluation of pedestrian safety, pedestrian traffic conflict evaluation model at urban road intersections should be established, and the model parameters should be calibrated. The result of this paper has an important significance for easing traffic congestions in big cities, and improving traffic safety.  
  关键词: Junction, pedestrian safety, traffic conflict model, improvement measure  
  下载:         下载 [6 ]  
  vol   1 (1)  :1492
 
   189. Research on the Method of Fast and Accurate Taxiway Bridge Testing
    作者姓名: Chun-xiang Qi and Xian-min Zhang  
  摘要:   To test the taxiway bridge fast and accurately the use of the impact coefficient model which is the method of vibration excited by truck jumping from threshold on deck is discussed in the paper. The calculated model is established based on the finite element method. The vibration characters of the beam model are analyzed. And then the calculated model of the impact coefficient can be determined by the dynamic and static analysis. The impact coefficient is influenced by truck jumping place, jumping height, vehicle and bridge inherent parameters, while the factors of running speed and irregularity degree of bridge deck can be ignored. So the accuracy of the impact coefficient model is improved. The application of the vibration excited method and the determination of the impact coefficient model are fulfilled the accuracy in the bridge test and shorten the working hours.  
  关键词: the impact coefficient; bridge test; exciting vibration; truck jumping; irregularity degree of bridge deck  
  下载:         下载 [6 ]  
  vol   1 (1)  :1500
 
   190. Monitoring and Forewarning of Urban Traffic Safety Based on GIS Considering Abnormal Conditions
    作者姓名: Ning Chen and Jia-guang Wu  
  摘要:   Geographical information system (GIS) has been used more and more widely. Nowadays, the technology of GIS can play a vital role in the management system with its strong capability of processing spatial data information. Considering the actual needs of traffic and transportation at present, it has important practical significance than promoting safety management and intelligence of urban traffic by means of establishing geographical information system for transportation (GIS-T) which refers to application of GIS and modern computer technology. Especially under the abnormal conditions, such as urban road traffic accident, construction site, weather conditions or rush hours, that makes urban traffic safety management more difficult. In this case, it is of great significance that analyzing existing problems in urban traffic which badly needs to be resolved and discussing safety management of urban traffic and its affected factors, afterwards some measures are also proposed. Finally, it describes the design principle and frame of a monitoring and forewarning system of urban traffic safety based on GIS.  
  关键词: Key words: GIS; abnormal conditions; traffic safety; monitoring and forewarning system  
  下载:         下载 [6 ]  
  vol   1 (1)  :1506
 
   191. Data Items for Personal Travel Surveys in China
    作者姓名: Han-Kang Mo and Xiao-Guang Yang  
  摘要:   What specific data elements should be included for the survey effort is one of the primary issues that the survey team needs to resolve in the implementation process of personal travel survey, and is important prerequisites for the survey instrument design. Generally, the analysis and travel demand modeling plans for the survey results and the survey’s overall goals will dictate what data elements should be included, but this determination process is time consuming. Considering the facts that the most personal travel surveys efforts have common concerns, therefore, reviewing data elements that are frequently collected is a productive exercise. By studying 16 cases of personal travel survey, this paper summarized the main data items for personal travel surveys in China firstly. Then the suggested items were provided for the development and refinement of travel demand forecast models. The research may be helpful for the metropolitan regions that commission travel surveys do not have in-depth knowledge and experience in this field.  
  关键词: personal travel survey; survey instrument design; data items;  
  下载:         下载 [6 ]  
  vol   1 (1)  :1514
 
   192. Applying Survival Analysis Approach to Traffic Incident Duration Prediction
    作者姓名: Guoxiang Kang and Shou-en Fang  
  摘要:   When traffic managers make efficient decisions to reduce the impact of traffic congestion due to freeway incidents such as accidents, disabled vehicles, and weather events, it is important to estimate incident duration, as accurately as possible. This paper applies a survival analysis approach to develop the WEIBULL accelerated failure time (AFT) duration prediction model with nearly three-year incident duration data from 2006 to 2008 from Jiaxing city’s freeway incident response centre in Zhejiang Province in China. The 2006 and 2007 data were used to estimate the prediction model and then, the model was calibrated and tested using 2008 data. The model prediction results show that a variety of factors that significantly affect incident duration and the model prediction accuracy is acceptable with the mean absolute percentage error (MAPE) scale. The goodness-of-fit tests with the likelihood-ratio statistic were used to find out whether the estimated parameters are stable over time. Thus, the findings of this paper provide an important method to predict the incident duration and the results can be used to improve emergency management measures to reduce incident-induced traffic congestion.  
  关键词: survival analysis; freeway incident; duration prediction; parametric model method;WEIBULL accelerated failure time (AFT) model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1523
 
   193. Traffic Capacity of the Three Gorges-Gezhouba Hydro Project Based on Multistage Queuing Theory
    作者姓名: Maoqing Wang and Jie Chen  
  摘要:   Research on ship’s traffic capacity of locks is an important elementary work in inland water navigation planning and the organization of ship’s flow. In the Three Gorges-Gezhouba hydro project, for the short distance between the two locks, ship’s arriving law of one of the locks can significantly affect the other one. Therefore the calculation of ship’s traffic capacity of the Three Gorges-Gezhouba hydro project is different from the one of common channels. Queuing theory is applied to the research. A study on ship’s arriving law is carried out based on the survey of traffic flow in the water area. Furthermore, with the influence of ship’s flow between the two locks under consideration, a model of double-stage M/M/n queuing model is established; both theoretical calculation and computer simulation are carried out in the research, the elements of average queuing time, average number of clients in the waiting queue and busy server probability are achieved; and the calculation model of traffic capacity of locks is proposed based on these elements. The model has been checked with the actual data surveyed, the result show that the model is practical and reasonable. Finally, dispatching plan based on ship’s traffic capacity is proposed.  
  关键词: queuing theory; multistage queuing; hydro project; traffic capacity  
  下载:         下载 [6 ]  
  vol   1 (1)  :1532
 
   194. TPMS Antenna Optimal Design and Experiment under High-Speed Rotation
    作者姓名: Huai-jun Li, Xiao-peng Xie, and Wei-qiang Wang  
  摘要:   The monitoring module of TPMS (Tire pressure monitoring system) is installed in the tire interior and is restricted by volume, power, high rotating environment etc. The antenna must have characteristics such as high gain, low standing-wave ratio (SWR).The relationship between the radio Doppler frequency shift, working frequency, velocity and tire depth was established under the high rotating environment. It was indicated that the value of frequency offset changed with rotating angle, showing the cosine function. It is proportional to frequency and rotating speed. Furthermore, the linear polarized wave transmitted is altered to round polarized wave with periodical changing electric-field. Secondly, an analysis was completed on the characteristics of the antenna impedance and gain with distance. As a result, the formula shows that the transmitting antenna’s impedance changes dynamically. According to the analysis mentioned above the optimum design scheme was established with a vertical hollow shape antenna. In this scheme, the impedance matching factor equals 1 nearly as well as it can meet the conjugate match in the almost rotating angle. Furthermore, SWR disturbed by the Doppler frequency shift is reduced and transmitting efficiency is improved. The antenna has fine polarization characteristics in a high rotating environment through simulation. A new TPMS was designed based on upward content, and experiments find it can meet the strict demands of a high rotating environment.  
  关键词: TPMS ANTENNA HIGH ROTATING SWR  
  下载:         下载 [6 ]  
  vol   1 (1)  :1540
 
   195. Improving Group Assiginment and AADT Estimation Accuracy of Short-Term Traffic Counts Using Historical Seasonal Patterns
    作者姓名: Ehsan Bagheri, Ming Zhong, and James Christie  
  摘要:   The importance of reliable estimates of travel demands for effective planning, design, and management of roads and facilities is well known by transportation engineers. The Federal Highway Administration (FHWA) factoring method is widely used by highway agencies to estimate AADTs for a wide range of roads, which are not possible to be covered by the permanent counters. This approach assumes that roads within a functional class have similar traffic variations and thus factors derived from the class can be applied to short-term traffic counts (STTCs) to account for seasonal variations, which have been shown to produce large AADT estimation errors sometimes in the literature. This paper contributes to improving the AADT estimations by constructing seasonal traffic variation profiles using all historical short-term counts available without imposing any additional monitoring cost, or making any change to existing traffic monitoring programs. Two pattern matching methods are proposed and tested with the data from a permanent counter on a winter recreational road in Alberta, Canada. It is found that the resulting 95th percentile (P95) AADT estimation errors of the two methods are 10.5% and 8.4% respectively, with a contrast to 62.1% from the FHWA method.  
  关键词: AADT estimation, Bayesian, Historical data, Temporal counting, Short term traffic count  
  下载:         下载 [6 ]  
  vol   1 (1)  :1548
 
   196. Evaluation of In-Vehicle Alcohol Intake Control Devices Using Agent-Based Modeling (ABM)
    作者姓名: Mahdi Hajizamani, Sílvia Costa Shrubsall, and José Manuel Viegas  
  摘要:   Improved technological safety measures and regulation modifications as well as better education of road users have had considerable influence on reducing the number of accidents and fatalities. However, assessing the effect of measures has been straightforward and in particular there is not enough knowledge on the precise impact on road safety of the new intelligent measures. Agent-Based Modeling (ABM) is a suitable platform to evaluate these innovative safety measures. Relatively quick results and reduced cost are amongst the main benefits of using simulation tools for evaluating safety measures. In this paper, ABM and Road Safety Measures, in particular intelligent safety measures, will be briefly introduced followed by the description of a proposal methodology to evaluate in-vehicle intelligent safety measures. This methodology will be tested for Alcohol Intake control devices. Alcohol-involved accidents contribute to about one third of fatal accidents in USA and EU. Development of alcohol-lock devices and regulations which prevent drunk drivers to start and run the vehicle are among priorities in road safety programs. Results show the adequacy of the described methodology.  
  关键词: Agent-Based Modeling, Road Safety Measures, In-Vehicle Safety Systems, Safety, Intelligent Transportation Systems, Alcohol-Lock  
  下载:         下载 [6 ]  
  vol   1 (1)  :1555
 
   197. Monitoring Driver States in an Adaptive Approach to In-Vehicle Risk-Level Communication
    作者姓名: Jeffrey Breugelmans and Yingzi Lin  
  摘要:   In recent years, the human-in-the-loop principle has been an emerging topic throughout the field of dynamic systems and control. Within this field, Human Assistance Systems (HAS) have become increasingly important and the driving environment, in particular, tends to play a distinctive role. Previous studies mainly aimed at making assistance systems as efficient as possible, reducing the possibility for errors (collisions) to a great extent. Due to this performance-oriented approach, however, former systems tend to take up the role of a strict supervisor, rather than that of a guide-like driver assistant. This research focuses on expanding the HAS? contribution to the control loop by incorporating both the driver state and an additional assistance level into the system?s output behavior, thereby aiming to advance the systems in terms of user interaction and satisfaction. As a result, system efficiency will be maintained, while simultaneously sustaining the driver?s perceived level of control.  
  关键词: Adaptive Driver Assistance Systems  
  下载:         下载 [6 ]  
  vol   1 (1)  :1562
 
   198. Does Today’s Driving Education Consider the Requirements for Handling Modern Driving Assistance System?
    作者姓名: Daniel Beisel, Thorsten Facius, Nina Helling, and Eckehard Schnieder  
  摘要:   In the context of an investigation made at the Institute for traffic safety and automation engineering, driving training concepts of the classes A (motor cycle) and B (road car) were comparatively examined and regarded Driving Assistance System for the passenger car range. The central question that needed to be answered in the study was, in how far the contents of the current driver training is fit to handle critical driving situations, as it can arise from a malfunction of an assistance system. The investigation comes to the result that both legally prescribed instructional contents and their exam contents are, from present view, not sufficient to respond to the requirements, which are made by modern driver assistance systems to the driver.  
  关键词: Driving education concepts, Assistance systems  
  下载:         下载 [6 ]  
  vol   1 (1)  :1570
 
   199. Big-Five Personality Factors Affecting Pedestrian Crossing Behaviors
    作者姓名: Nan Jiang, Yilong Xiao, Yue Chen, Kan Shi, Barry Watson, Mark King, Judy Fleiter, Shaoyong Wang, and Liping Wang  
  摘要:   Human personality is an important component of psychological factors affecting pedestrian crossing. This paper reports a questionnaire survey on the effects of pedestrian personalities (including neuroticism, extraversion, openness, agreeableness and conscientiousness) on pedestrian violation in China. 675 feedbacks were obtained, of which 535 samples were valid for analysis. The results of the hierarchical regression analysis showed that educational level had significant effect on violation; agreeableness had significant effect on violation, conditional compliance and unconditional compliance; consciousness had significant effect on violation and conditional compliance; extraversion had significant effect on unconditional compliance; neuroticism had significant effect on violation; educational level had significant effect on violation. The results implied that psychological measures played a very important role in pedestrian safety.  
  关键词: Big-Five personalities, pedestrian, violation, compliance  
  下载:         下载 [6 ]  
  vol   1 (1)  :1577
 
   200. A Latent Class Modeling Approach for Identifying Injury Severity Factors and Individuals at High Risk of Death at Highway-Railway Crossings
    作者姓名: Naveen Eluru, Morteza Bagheri, Luis F. Miranda-Moreno, and Liping Fu  
  摘要:   The growing focus on improving railway freight transportation in North America has resulted in increased attention to safety at highway-railway crossings (HRC). Recently, federal government agencies such as US Federal Railroad Administration (FRA) and Canadian Transportation Safety Board (TSB) have alluded to safety concerns associated with HRC. Safety at HRCs are of considerable importance to the government as well as the public due to the significant economic and emotional damages associated with accidents at HRC. To address these safety concerns, transportation researchers are focusing on developing countermeasures that enhance safety at HRC. Earlier research on HRC safety has employed a risk based approach considering both frequency and consequence; however, there has been very little research examining the consequence of the collision. In this paper, we aim to identify the different factors that influence injury severity of highway vehicle occupants, in particular drivers, involved in a vehicle-train collision. The commonly used approach to modeling vehicle occupant injury severity is the traditional ordered response model. However, the ordered response model restricts the effect of various factors on injury severity to be constant across all accidents. It is possible that accidents might be grouped (clustered) into different segments to differentiate the effects of various factors at the segment level. The current research effort proposes an innovative latent segmentation-based ordered response model to study injury severity. In this case, individuals (drivers) are assigned probabilistically to different segments with probability of getting injured specific to each segment. The validity and strength of the formulated collision consequence model is tested using the United States Federal Railroad Administration database which includes inventory data of all the railroad crossings in the US and collision data at these HRC crossings from 1997 to 2006. The research effort will shed light on the most important factors that affect the severity of injuries to vehicle occupants involved in collisions.  
  关键词: Collision consequence, Highway-railway crossing, Occupant injury severity, Latent segmentation based ordered response model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1584
 
   201. Road Network Operation Monitoring Model and Design Based on BP Neural Network Technology
    作者姓名: Leihong Dong  
  摘要:   The changing in road traffic mode of development, is one of the objectives to achieve dynamic operation of road network management and control. Solving the real-time monitoring of road network running technique is the key to dynamic management of road network. This paper first analyzes the road network operation and monitoring needs to be made aware of the basic network elements, such as road infrastructure, equipment, transport operating parameters, traffic incidents and road condition rating, etc.; and the use of digital neural network theory, proposed road network to run BP neural network monitoring model, the main parameters of network monitoring input - output model mapping. Finally, the paper will briefly introduce the national road network that is running monitoring system's fundamentals.  
  关键词: Road network; Operation monitoring; ITS; BP Neural network, RNO-BPNNM  
  下载:         下载 [6 ]  
  vol   1 (1)  :1600
 
   202. An Authority-Based Idle Bandwidth Sharing Approach in Vehicle Ad-Hoc Network
    作者姓名: Jin-Lih Shieh, Wei-Hsun Lee, and Yau-Hwang Kuo  
  摘要:   The fast development of wireless communication technologies such as VANET and telematics services is getting popular. Some of them, such as the traffic management system, audio/video streaming services and location-based services, need large Internet bandwidth which may exceed the available bandwidth of a vehicle. In this paper, an Authority-based Idle Bandwidth Sharing Approach (AIBSA) is proposed to provide extra bandwidth for vehicles required to access telematics services. To achieve this goal, AIBSA creates an overlay of idle bandwidth information for vehicles, including their authority relationships and quantities of idle bandwidth. Using that information, AIBSA helps vehicles obtain extra Internet access bandwidth from other vehicles through inter-vehicle communication (IVC) via a short range wireless interface which differs from the main Internet access interface. The maximum flow planning principle is adopted to develop a novel idle bandwidth planning algorithm which can find out one or more authorized bandwidth utilization paths for the demanding vehicles to get expected Internet bandwidth from the idle bandwidth owners. The proposed planning algorithm also considers the overall status of idle bandwidth demands and supplies, global idle bandwidth utilization efficiency, and authorization policies. Using AIBSA, the authority, bandwidth competition and low idle bandwidth utilization problems in traditional bandwidth sharing schemes can be solved. A simulation program is developed to evaluate the performance of AIBSA, and the simulation result shows that it can largely enhance the global utilization of idle bandwidth in a VANET.  
  关键词: VANET, telematics, bandwidth sharing, maximum flow.  
  下载:         下载 [6 ]  
  vol   1 (1)  :1609
 
   203. Factor Analysis of Freeway Incident Duration and Cusp Catastrophe Modeling
    作者姓名: Haozhe Cong, Junhua Wang, and Shouen Fang  
  摘要:   The influence factors of incident duration and their effects were analyzed by analysis of variance (ANOVA), totally 12 items of factors analysis. Then statistical methods were developed to allow quantitative regression of cusp catastrophe model (CCM) with incident duration data. The stepwise regression analysis was employed to find the best group of factors including alarm time, lanes occupied, casualties, rescue vehicles, incident style, time arrived on spot. As a normal factor AlarmTime, Lanes were used. As a bifurcation factor Casualties, RescueVehicles, IncidentStyle, TimeOnSpot were used. The fitting result of cusp catastrophe model indicates that three levels of duration were defined by stability, potential catastrophe and catastrophe areas and this model could predict the sudden changes of incident duration well. This CCM model could provide technical support for decision-making to dispose incidents.  
  关键词: Freeway Incident, Duration, Factors Analysis, Cusp Catastrophe  
  下载:         下载 [6 ]  
  vol   1 (1)  :1618
 
   204. A Methodology for Comparing Non-Intrusive Traffic Detectors under Different Operating Conditions
    作者姓名: Benjamin Grone, Justice Appiah, and Laurence Rilett  
  摘要:   The installation and maintenance of traditional traffic data collection technologies such as inductive loops can disrupt the smooth flow of traffic, undermine pavement quality, and be a significant safety concern to both motorists and construction personnel. Consequently, there has been a strong emphasis on the development and deployment of non-intrusive traffic detection systems. These devices serve as alternatives to conventional systems by allowing agencies to collect data at high traffic volume locations without compromising operations or safety. The main objective of this research is to investigate the accuracy, reliability,cost, and user-friendliness of various non-intrusive detectors. The study is based on data collected at a test bed in Nebraska where four types of non-intrusive detectors (Autoscope Solo Pro II video image detection system, ISS RTMS G4 microwave radar system, Wavetronix SmartSensor microwave radar system, and GTT Canoga Microloop magnetic induction system) have been deployed. A paired or yoked statistical analysis is used to compare the technologies “sideby-side” so that any environmental and traffic effects are accounted for. The study identifies the relative accuracy of each detection system for each traffic variable (volume, speed, and classification) as a function of environmental conditions, time of day conditions, and traffic conditions. In addition, the variances of the traffic parameter estimates are also provided so that transportation agencies will have reasonable operating bounds for the different technologies which are key input to their ATMS algorithm designs.  
  关键词: Non-Intrusive Traffic Detectors  
  下载:         下载 [6 ]  
  vol   1 (1)  :1627
 
   205. Study on the Mountainous Freeway Vertical Alignment Safety Based on Typical Truck Climbing Characteristics in China
    作者姓名: Yufeng Gui, Junhua Wang, and Shouen Fang  
  摘要:   Four most popular trucks in China are chosen, the engine performances of which were analyzed by bench test. The truck?s climbing ability was calculated based on dynamics principle, and the result show that the current vertical alignment indexes cannot guarantee the trucks to travel at minimum freeway speed limit 60km/h. Based on the truck?s climbing ability, the equilibrium climbing speeds at different grades are calculated, and the maximum grade length limitation at different grades is also recommend when design speed is 80km/h, critical speed is 60km/h.  
  关键词: Truck climbing characteristics, Vertical alignment design index, Mountainous expressway, Bench test  
  下载:         下载 [6 ]  
  vol   1 (1)  :1634
 
   206. Maximum Safe Speed Calculation Model Research on Curve
    作者姓名: Xingwang Liu  
  摘要:   According to statistics, the truck is the vehicle that often causes accidents in the horizontal curves. This is largely because the quality of front and rear axles of vehicles is quite different in different turning radius around the axis, the centrifugal forces are different, and the operation difficulty is increased. At the same time, the vehicle operation difficulty also is closely related to vehicle speed when vehicle speed is faster,it is more difficult for vehicle to operate and traffic accidents occur. Therefore, it is necessary for curve design and controlling traffic speed to be taken into account for vehicles and road factors, the analysis is the maximum safe speed on curve. The maximum safe speed calculation model on curve is set up by considering the vehicle wheelbase, load quality factor, radius and super elevation factors. The model can be used to inspect curve radius and super elevation and to determine the speed limit value.  
  关键词: horizontal curve speed model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1642
 
   207. Incorporating Highway Safety Factors into Provincial Highway Investment Decision-Making in Saskatchewan, Canada
    作者姓名: Andrew G. Liu  
  摘要:   According to statistics, the truck is the vehicle that often causes accidents in the horizontal curves. This is largely because the quality of front and rear axles of vehicles is quite different in different turning radius around the axis, the centrifugal forces are different, and the operation difficulty is increased. At the same time, the vehicle operation difficulty also is closely related to vehicle speed when vehicle speed is faster,it is more difficult for vehicle to operate and traffic accidents occur. Therefore, it is necessary for curve design and controlling traffic speed to be taken into account for vehicles and road factors, the analysis is the maximum safe speed on curve. The maximum safe speed calculation model on curve is set up by considering the vehicle wheelbase, load quality factor, radius and super elevation factors. The model can be used to inspect curve radius and super elevation and to determine the speed limit value.  
  关键词: Investment Decision-Making, Highway Safety  
  下载:         下载 [6 ]  
  vol   1 (1)  :1649
 
   208. Research on Warehouse Monitoring System Based on Complex Event Processing
    作者姓名: Ming Lei and Kezhong Liu  
  摘要:   With the rapid development of RFID technology, the demands of a relevant software system have been rising in recent years. The main challenges are showm to be in the design of middleware: (1) the amount of the raw RFID data is huge, so the middleware must own a strong ability to filter and compress data to reduce system overhead; (2) the raw RFID data is uncertain and incomplete, so there must be a mechanism to avoid defects in the middleware. Then we use a technology that can process the large-scale data and complex relationship between data in real time. The technology is Complex Event Processing (CEP). CEP is a technology that can process the relationship among events and large-scale complex RFID events. Based on the CEP, we, take the warehouse monitoring system as an example, and discuss events the rules of event filtering.  
  关键词: RFID CEP Warehouse Event  
  下载:         下载 [6 ]  
  vol   1 (1)  :1656
 
   209. Design LRT Signal Priority Strategy to Improve Arterial Traffic Mobility
    作者姓名: Jatinder Tiwana, Mehmood Zaman, Tony Z. Qiu, and Arun Bhowmick  
  摘要:   In this research we studied the impact of Transit Signal Priority (TSP) on the arterial mobility. For the purpose of experiment we have chosen the 111th Street corridor in Edmonton. Recently the LRT extension was carried out and the LRT passes through this intersection. What is peculiar to this intersection is that shopping mall, the LRT and transit bus stations are all located close-by. Moreover, the transit buses have to cross the LRT tracks for entry and exit from the station. For the purpose of analysis and optimizing the LRT crossing signals, we used the Ring Barrier Controller (RBC) and Vehicle Actuated Programming (VAP) in VISSIM. The three options explored were (a) LRT preemption, (b) LRT prediction priority (c) LRT/Transit Bus priority. In options (b) and (c), the arrival time of the LRT is predicted in advance and the signal phases are modified to ensure uninterrupted passage of the LRT. This leads to better performance as there is lesser number of signal changes compared to the first option. In the absence of dedicated bus lanes option (b) was found to be most beneficial.  
  关键词: Transit Signal Priority, VISSIM, Ring Barrier Controller  
  下载:         下载 [6 ]  
  vol   1 (1)  :1664
 
   210. Urban Traffic Collision Frequency Analysis and Modeling for Edmonton in Canada
    作者姓名: Gurjeet Shaheed, Klebert Machado, Tony Z. Qiu, and Md. Hadiuzzaman  
  摘要:   Consistently higher number of traffic collisions was observed on Friday as compared to other days of the week in Edmonton, Canada. The collision data was investigated and a collision prediction model was formulated based on three contributing factors: 1) number of daylight hours, 2) number of snowfall hours,and; 3) visibility on daily basis. A negative binomial (NB) model was formulated to establish a relation between the collision frequency and the independent variables. The model accuracy test results were found good. Statistical measures indicate that increased traffic collision is significantly related with increased number of snowfall hours. The proposed NB model could provide a realistic estimate of expected collision frequency for a particular day as a function of number of hours of daylight, number of hours of snowfall and visibility. It is expected that predicted collision frequencies will help the decision maker to quantify the traffic safety of Edmonton.  
  关键词: Collision Frequency Analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :1672
 
   211. Study on Travel Time Reliability of Probe Vehicle System Based on Minimum Sample Size Analysis
    作者姓名: Yang Yang, Enjian Yao, Da Qu, and Yi Zhang  
  摘要:   For the variance and unbalanced distribution of probe vehicle data, it is necessary to ensure the probe data number larger than the minimum sample size to obtain reliable traffic information. Based on the standard deviation approach, the minimum sample size for each road link is calculated with the data collected from Nanjing probe vehicle system first. And then the influence of road condition, traffic status and driving behavior on travel time’s reliability is analyzed. Finally, a minimum sample size forecasting model is estimated based on the multiple linear regression approach and is validated with high accuracy. Since road condition factors (e.g. road level, link length) and traffic status indicators (e.g. travel speed, congestion level) are included in the model, the minimum sample size necessary to generate reliable travel time information can be estimated. It is highly expected that the results can provide an important reference to probe vehicle system configuration plan.  
  关键词: Probe vehicle system, Travel time reliability, Minimum sample size  
  下载:         下载 [6 ]  
  vol   1 (1)  :1680
 
   212. Use of Encounter Model for Collision Risk Assessment of Yangtze River
    作者姓名: Di Zhang, Xin-ping Yan, Pin-fu Yang, and Jin-fen Zhang  
  摘要:   As China's largest and the world's busiest inland river, the sustainable development and navigational safety of Yangtze River are widely concerned by various parties. However, with the national development of the Middle and Western parts of China, the throughput as well as the passing ships of Yangtze River has been increasing rapidly during the past few decades. Collisions, groundings, overturns, oil-spills, fires, and other accidents have occurred repeatedly and caused serious consequences. In view of this, this paper examines collision risk assessment on the Yangtze River. The research presented a collision risk assessment approach which is based on a novel ship encounter model. This model considers the historical and the current traffic conditions as well as the environmental features, which could be used for evaluation and prediction of collision risk. Finally, the collision risk of the main route of Yangtze River was evaluated as an example.  
  关键词: Yangtze River, Collision, Risk Assessment, Encounter Model  
  下载:         下载 [6 ]  
  vol   1 (1)  :1687
 
   213. Rain Removal from Videos Using Curve Registration Techniques
    作者姓名: Yu-fen Sun, Gang Liu, and Kun Xu  
  摘要:   Rain degrades the quality of outdoor videos. To recover the scene quality in images, rain steaks should be removed. A new rain removal method that can process richly textured images and recover moving objects occluded by rain without blur is proposed. This method is based on the fact that it is unlikely that two rain drops of the same size appear in the same position or neighboring positions in two consecutive frames, but the major part of scene in one frame will appear in the next frame even when there exist camera motion and object motion. Curve registration adopting dynamic time warping technique is used to distinguish the random part from the repeated part in video frames. Based on the registration result, rain pixels are detected and recovered. Experiments show the effectiveness of this rain removal method.  
  关键词: de-weathering, image enhancement, time warping, video processing  
  下载:         下载 [6 ]  
  vol   1 (1)  :1695
 
   214. Highway Safety Analysis: British Columbia Practices
    作者姓名: Zongfan Luo and Ming Zhong  
  摘要:   Traffic collisions represent a major problem on a worldwide basis. Every year, over 1.2 million people die in traffic collisions across the world and between 20 and 50 million are injured or disabled. In most regions of the world this epidemic of road traffic injuries is still increasing. Highway agencies all over the world are paying more and more attentions on highway safety. Highway safety has been taken into account seriously during the project programming and implementation in British Columbia Ministry of Transportation and Infrastructure, Canada (BCMOTI). This article describes the BCMOTI highway safety practice, which includes general safety analysis procedure to identify the safety problems, the improvement option generation, and economic analysis for improvement options. Historically, collision rates have been used as the basis for safety analysis. Research has shown that there are limitations with this approach due to the non-linear relationship between collision frequency and exposure. Collision prediction modeling is the recommended technique for estimating road safety in the American Association of State Highway and Transpiration Officials (AASHTO) Highway Safety Manual. The BCMOTI developed her own collision prediction models (CPMs) and collision modification factors (CMFs) to be used to assess highway safety improvements on British Columbia highways. It is believed that the CPMs and CMFs have improved the overall safety performance estimate (safety benefits) for road safety analysis and these outputs serve a valuable purpose with respect to option selection, project ranking and programming.  
  关键词: Traffic collisions; highway safety; CPMs; CMFs; safety benefits  
  下载:         下载 [6 ]  
  vol   1 (1)  :1702
 
   215. Use the Number of Passengers on and off Backstepping the OD Matrix Methods Research
    作者姓名: Limin Zeng, Fangyi Wei, and Xuewu Shen  
  摘要:   In order to reduce the waste of human and material resources in the actual OD survey and to make the investigation more convenient, the following investigation was conducted on behavioral characteristics of passengers who traveled by bus using analysis from the basic distribution of the distance of bus passengers traveled. Based on the probability of bus passengers would get off, the number of passengers on and off as the conditions already know, proposed a single bus line passenger OD matrix inverse method in accordance with the nature of land use on the site together, and then extended to the public transportation network. This achieved the association of OD matrix of line to region. Finally, determination of the traffic zone OD matrix by division of the traffic zone status through case study, verified the feasibility and effectiveness.  
  关键词: bus passenger; the upper and lower number of guests; inverse OD matrix; public transportation network  
  下载:         下载 [6 ]  
  vol   1 (1)  :1709
 
   216. Research on Traffic Control and Simulation Integrative Platform
    作者姓名: Lei Shang and Ben Zhang  
  摘要:   In order to analyze the characteristic of Chinese mixture traffic flow, this paper built a traffic control and simulation integrative platform. It is based on the system simulation technology, traffic engineering, compute science and the virtual reality technology. By using this integrative platform, traffic flow simulation, signal control design and traffic infrastructure valuation can be conducted. The main parts of this platform involves the demand analysis model, roadnet describe model, traffic regulation model, signal control model, vehicle behavior model, route choice model and input/output model. In this paper, the framework and the some key models were illuminated. Finally, a case study was done based on some field data. From the results, this platform was tested to be effective to some extent.  
  关键词: traffic flow simulation, vehicle behavior model, virtual reality  
  下载:         下载 [6 ]  
  vol   1 (1)  :1716
 
   217. Study of Fatigue Measurement Based on Eye Tracking Technique
    作者姓名: Lei Wang and Ruishan Sun  
  摘要:   Eye tracking concept and technique was introduced into studying of fatigue measurement issues in aviation field. A fatigue measurement method based on PERCLOS value calculation was put forward in this paper and its frame, process and algorithms were discussed. Then the feasibility and reliability of using PERCLOS value as the fatigue judgment index were studied by eye tracking experiment. The experiment results showed that PERCLOS value is a perfect index for measuring fatigue and the threshold was suggested to be set as 0.5 when eye close threshold is set as 70%. Finally it concluded that the fatigue measurement method based on eye tracking is effective and reliable, and the applicable Fatigue Measurement System was expected to be developed and used in future.  
  关键词: fatigue measurement, eye tracking, PERCLOS, FMS  
  下载:         下载 [6 ]  
  vol   1 (1)  :1723
 
   218. Study on Guidance Information Expression Based on Drivers’ Compliance Rate
    作者姓名: Jing Liu, Rui Sun, and Lan-sun Zhou  
  摘要:   The drivers’ compliance rate of guidance information is increased step by step when the traffic is changing from smooth to congested, or the guidance information is disseminated from mono-source to multi-source. Therefore, the guidance effect can be heightened by exaggerating the magnitude of traffic jam properly and/or disseminating the traffic guidance information in various sources. Considering the drivers’ compliance rate of guidance information under different situations, the paper builds four expression models of guidance information (MSDM, MSEM, BSDM, and BSEM). When the traffic flow growth of a link is too high as to exceed the threshold, one expression mode can be selected to increase drivers’ compliance rate of guidance information, make the growth close to the expected value, and achieve the purpose of unloading finally.  
  关键词: Intelligent Transport System (ITS); Traffic Information Dissemination; Guidance Information Expression; Compliance Rate of Guidance Information  
  下载:         下载 [6 ]  
  vol   1 (1)  :1730
 
   219. An Adaptive Algorithm for Dynamic Vehicle Routing Problem Based on Real Time Traffic Information
    作者姓名: Deqi Huang, Xinping Yan, Xiuming Chu, and Zhe Mao  
  摘要:   Vehicle Routing Problems (VRP) became a hot issue since few decades. However, before the optimization has started, almost all the work dealt with static information where all data is known in advance. Dynamic scheduling vehicle routes are a crucial management problem. In this paper, a dynamic vehicle routing problem based on real time traffic information is proposed and an adaptive algorithm is developed. Different response strategies are evaluated using dynamic path adaptive search method. The algorithm has been tested on a set of benchmarks that are defined, and it is tested on a realistic case study in road network of China. It confirms that the developed method can be applied to real world instances.  
  关键词: Adaptive Algorithm; Dynamic Vehicle Routing; Real Time; Traffic Information; Ant Colony Algorithm;  
  下载:         下载 [6 ]  
  vol   1 (1)  :1736
 
   220. Modelling Pedestrian Behavior at Signalized Intersections: A Case Study in Shanghai
    作者姓名: Ying Ni and Keping Li  
  摘要:   Pedestrian crossing behavior at signalized intersections consists of “entering the crosswalk” and “interactions at the crosswalk”. According to the time when a pedestrian enters the crosswalk, pedestrian crossing behavior can be classified into four types: “Green Walkers (right behavior), “Late Walkers”, “Risk Walkers” and “Early Walkers”. Manoeuvres taken by either pedestrians or vehicle drivers to avoid collisions are called interactions, which can be distinguished by five levels depending on whether pedestrians/drivers obey traffic rules, intensity of interactions and executor of a manoeuvre. A case study at 5 representative crosswalks in Shanghai were carried out and behavior of 1328 pedestrians was analyzed in order to find out pedestrian behavioral characteristics and evaluate pedestrian safety at signalized intersections. The results showed that pedestrian non-compliance was rather serious in Shanghai, 44 percent of the pedestrians arriving during non-green time crossed on Red. According to the regression model, average pedestrian delay was found to be the most sensitive influencing factor, follows was average headway of conflicting vehicles and crossing distance. “Lane (group)-based tactic” and “side-based tactic” used by non-compliant pedestrians to cross the street resulted in high risks for Risk Walkers. Green Walkers took manoeuvres frequently to yield to turning vehicles, due to the Right Turn on Red, unreasonable control method of turn movement and low traffic discipline of drivers.  
  关键词: Pedestrian behavior, Signalized intersections, Non-compliance, Interactions,  
  下载:         下载 [6 ]  
  vol   1 (1)  :1745
 
   221. The Application Research of Container Berth Allocation Based on Ant Colony Algorithms
    作者姓名: Meng Yu and Shaomei Wang  
  摘要:   At container terminal, it is critical to improve the berth to utilization efficiency, shorten the waiting time of ships at ports, and decrease the operation cost under the condition of limited shoreline resources. Based on the study and analysis of the characteristic about the port service system, related assumptions are proposed and the mathematics model of dynamic allocating the berth and quay cranes is formulated under the objective of the shortest waiting time for container ships in port. Based on the similarities of berth allocation and ant foraging path selection, parallel ant colony algorithm based on pheromone is proposed. Experimental results show that algorithm can be applied effectively to optimize berth allocation problem (BAP).  
  关键词: Container Terminal; Berth Allocation problem; Ant Colony Optimization  
  下载:         下载 [6 ]  
  vol   1 (1)  :1755
 
   222. Modeling of Pedestrian Crossing Behavior at Unmarked Roadway in China
    作者姓名: Xiangling Zhuang and Changxu Wu  
  摘要:   Pedestrian behavior at unmarked roadway needs to be addressed for their current serious safety issue. This paper modeled pedestrian roadway crossing as decision-making processes in risky situations where they choose speed to minimize discomfort. Discomfort was represented by their perceived risk and deviation from their expected crossing time. The predicted walking speed, which is the most important variable during crossing, was consistent with observed field data. Possible application in road design and limitation of the model was discussed.  
  关键词: unmarked roadway, pedestrian speed, perceived risk  
  下载:         下载 [6 ]  
  vol   1 (1)  :1762
 
   223. Simulation of Infrared Thermal Imaging in a Virtual Environment Driving Simulator
    作者姓名: Linzhen Nie, Na Chen, and R. Mourant  
  摘要:   In addition to fatigue and alcohol, vehicle’s headlights are another major factor in causing accidents after dark. Under conditions of nighttime illumination a driver’s visual perception ability is reduced. Night vision enhancement technologies using infrared (IR) thermal sensing can help improve a driver’s vision at night. Several advanced IR camera companies are collaborating with world-leading automobile manufacturers with the goal to incorporate thermal IR image devices in real vehicles. However, there is not sufficient evidence to conclude that IR image devices in automobiles will result in less nighttime accidents. Moreover, potential distraction brought by such a device needs to be evaluated as well. This study focuses on creating a nighttime driving environment that simulates thermal infrared imaging in a driving simulator. The nighttime driving environment is built using Unity3d and applied to a driving simulator in the Virtual Environments Laboratory at Northeastern University. Subjects are required to drive in the simulator using the simulated thermal IR imaging system under nighttime conditions. Preliminary results on drivers’ performance and distraction are reported.  
  关键词: Thermal infrared imaging, nighttime driving safety, driving distraction, driving simulator  
  下载:         下载 [6 ]  
  vol   1 (1)  :1770
 
   224. Route Choice for Emergency Evacuation
    作者姓名: Jingjing Zhang and Jian Lu  
  摘要:   This paper established the network path model for Su tong bridge emergency transportation evacuation in the beginning. And then the four principles to evaluate emergency evacuation route was proposed, followed by an analytic hierarchy process to calculate weight of each component by using algorithm of the minimum cost max-flow to optimization  
  关键词: Emergency evacuation route AHP Minimum cost max-flow Lingo  
  下载:         下载 [6 ]  
  vol   1 (1)  :1778
 
   225. Vessel Traffic Flow Detection and Tracking in River
    作者姓名: Lei Xie, Xiumin Chu, Ming Huang, and Zhongzhen Yan  
  摘要:   Vessel traffic flow detection is an important and challenging research field and has been broadly investigated in the past. Researchers have done an extensive work, and various devices have been developed to extract vessel traffic information, such as Vessel Traffic Service System (VTS), Automatic Identification System (AIS), and intelligent visual surveillance system. In this paper, a novel detection method is proposed based on Kalman filter to extract vessel traffic flow from optical imagery. The proposed algorithm includes two stages: moving vessel detection and dynamic vessel tracking. Vessel detection is a key step and the concept of tracking vessel is built upon the vessel-segmentation method. According to the segmented vessel shape, a three-step predict method is proposed based on Kalman filter to track each vessel. The proposed method has been tested on a number of monocular vessel traffic flow image sequences. The experimental results show that the algorithm is effective and robust.  
  关键词: image processing, vessel traffic flow, automatic identification system, Kalman filter  
  下载:         下载 [6 ]  
  vol   1 (1)  :1788
 
   226. Study on Vehicular PEMFC Humidity Estimate Based on Soft Sensing Technology
    作者姓名: Bao-hua Tan, Shu-hai Quan, Rui Quan, and Xiaolei Cao  
  摘要:   Automotive proton exchange membrane fuel cell humidity has a significant impact on its output performance, and which will strongly affect the performance of vehicle power-driven. This paper analyzes the main parameters which impact the proton exchange membrane fuel cell water content, improves orthogonal least squares algorithm, and establishes RBF neural network model based on the relationship among water content in proton exchange membrane fuel cell and internal resistance, temperature and Current density, etc. By taking the proton exchange membrane fuel cell runtime data in a 50 KW experimental Vehicle, the simulation results show that the model output humidity value reaches the preset moisture estimation accuracy.  
  关键词: New Energy Vehicle, Proton Exchange Membrane Fuel Cells (PEMFC), Humidity, Neural Network Model, Orthogonal Least Squares (OLS)Algorithm, Membrane Water Content)  
  下载:         下载 [6 ]  
  vol   1 (1)  :1798
 
   227. Research on Dynamic Traffic Monitoring Based on RFID Technology in WSN
    作者姓名: Zhi-yong Lu, Chao Chen, Ji Xiong, and Xiao-Di Peng  
  摘要:   Wireless Sensor Network (WSN) and Radio Frequency Identification (RFID) integrated technology (Wireless Sensing Identification, WSID) is an inevitable trend in WSN and RFID fields in the future because of the incorporation of IEEE802.15.4 standard and Zig Bee standard. This paper developed a dynamic traffic monitor model in which RFID is integrated into the traffic monitoring system architecture based on wireless sensor network, and presented a wireless sensing identification traffic monitoring network (WSITMN). WNITMN can identify the moving vehicles using automated identification technology and collects traffic information such as vehicle speed, density, flow and other pertinent information. Furthermore, WNITMN can identify the vehicles which are violating laws and regulations. Finally, RFID reader collision is discussed. The information interaction function of WSN can be used to solve this collision.  
  关键词: WSN;RFID;traffic information collection  
  下载:         下载 [6 ]  
  vol   1 (1)  :1809
 
   228. Quantitative Analysis on Demand of Region Highway Passenger Transportation Volume Statistics Indices
    作者姓名: Tong-yan Dai, Biao Wu, and Xiao-jie Qi  
  摘要:   To master information demand of different users, the statistics principle was adopted to analyze quantitatively index demand according to the survey data of users. Based on constructing the statistics index system of region highway passenger transportation volumes, the way of questionnaire was utilized to conduct demand survey for importance, feasibility, demand frequency and demand level of statistics indices. Through analyzing the effective samples, the parameters of each survey index including average, full marks frequency, rank sum and coefficient of variation were calculated with the mathematics statistics method. Following the equal-probability principle, the expected value was calculated to evaluate the significance and feasibility of each index. The results show that the method is reliable and effective to analyze quantitatively the indices demands of various users.  
  关键词: region; highway passenger transportation volume; statistics index; information demand; statistics principle  
  下载:         下载 [6 ]  
  vol   1 (1)  :1818
 
   229. Research on the Status Quo of Graphical Information Released by VMS on Expressway in China
    作者姓名: Rui Sun, Wenfeng Liu, Yisheng Wang, and Lin Wang  
  摘要:   With the application of intelligent transportation system (ITS), variable message sign (VMS) has been an important tool for real traffic information service, dynamic guidance and traffic management on expressway. As the graphical information have several advantages, such as simple, plain, easy to be identified and understood, the application of the graphical symbols through VMS to transmit real-time travel and traffic information will be a very helpful and effective ITS application on expressway. Based on the investigation on the status quo of graphical symbols released by VMS in China, the main types and equipment performances of VMS on expressway are summarized. And the main problems of wide application of graphical symbols released by VMS on expressway are analyzed. Finally, based on the introduction of typical cases of the graphical symbols for traffic information in Japan and Europe, this paper put forwards some suggestions on the standardization work for graphical symbols released by VMS on expressway in China.  
  关键词: graphical symbol, variable message sign, VMS, standardization  
  下载:         下载 [6 ]  
  vol   1 (1)  :1826
 
   230. Quantitative Study on the Influence of Pedestrians Twice Crossing in the Left-Turn Phase at Multi-Phase Signal Intersection
    作者姓名: Teng Su, Xiaoduan Sun, Yulong He, and Weibin Li  
  摘要:   This paper studies a frequent violation at multi-phase signal intersection of Beijing, that large number of pedestrians twice crossing street in the left-turn phase. Based on a large number of measured data, the influence of this violation on intersection safety is analyzed by using the theory of traffic conflict. To solve the violation, some strategy and methods have also been summarized. As an important link in City Road system and a crucial section of the whole road net, the intersections in the city act as the nodes connecting the crossing roads and control the vehicle volume. Due to the complexity of traffic participants and the high concentration of traffic flow, traffic accidents are very liable to occur in the crossings. According to the traffic accident statistics in China (2008), there are 46148 traffic accidents in crossings, taking account of 17.40% of the total number of the traffic accidents and leading to 9549 death. (Ministry of Public Security, 2009) Therefore the studies on the influence factors of crossings safety have been considered as an urgent need. Multi-phase signal has been adopted in increasing amount as an effective method to improve the traffic safety. In this system, the left-turn phase is put forward to separate the straight flow and left-turn flow to different time sections, thus to decrease the traffic confliction points. However, the implementation of left-turn phrase will to some extent extend the waiting time for the pedestrians passing through the streets. The pedestrians are likely to break the traffic rules and cross the roads regardless of the traffic signal if the waiting time is too long or the waiting crowd has reached saturation. Normally they no longer cross the road along with straight flow,but first move to the side-sections of left-turn lanes, then go across the intersection by taking the gaps between left-turn flow and wait until left-turn phase finishes. (Shown in Figure.1) The violation of signal will lead to more conflicts between vehicles and pedestrians hence have a negative influence on the whole safety issues.  
  关键词: pedestrians twice crossing; vehicle turn left phase; conflict; capacity  
  下载:         下载 [6 ]  
  vol   1 (1)  :1833
 
   231. A Bayesian MCMC Approach to Study the Safety of Vessel Traffic
    作者姓名: Fengyang Yin, Junmin Mou, and Jianhua Qiu  
  摘要:   More and more attention has been directed to the vessel traffic safety, especially in the sensitive area such as in the vicinity of big dams. Since the uncertainty of the vessel traffic risk, the traditional way in analysis is inadequate. This paper introduces a novel method, a Bayesian MCMC approach to study the safety of vessel traffic. By learning the vessel traffic accidents and in-depth investigating the contributors, an effective Bayesian Network has been developed. The results show the method can be used for decision support in vessel traffic management.  
  关键词: MCMC; Vessel traffic safety; Bayesian Networks; Risk analysis  
  下载:         下载 [6 ]  
  vol   1 (1)  :1838
 
   232. Functional Modeling for an Integrated Pipeline Integrity Management System Using IDEF0 Approach
    作者姓名: Yutao Liu and Hao Hu  
  摘要:   To satisfy the requirement of pipeline integrity management (PIM) in a long operational period and a large transmission distance, a comprehensive PIM system is presented, which is integrated with lifecycle management, dynamic risk management and GIS technology, and IDEF0 method is utilized to functional modeling. Four function modules – “PIM preparation”, “PIM implementation”, “PIM termination” and “PIM_GIS data management platform” are categorized according to pipeline lifecycle. “PIM implementation” together with PIM database based on GIS technology is emphatically analyzed in detail, which involves the process of dynamic risk evaluation. Compared with the existing PIM system, the proposed one enjoys more systematic function and better description effect.  
  关键词: pipeline integrity management; functional modeling; IDEF0 method  
  下载:         下载 [6 ]  
  vol   1 (1)  :1848
 
   233. HMM Based Fuzzy Model for Short-Term Traffic Forecasting
    作者姓名: Gang Chang, Yi Zhang, Danya Yao, and Yun Yue  
  摘要:   This paper presents a Hidden Markov Model (HMM) based fuzzy model of short-term traffic forecasting. The model uses three sequential phases. Firstly, the HMM is used to partition the traffic flow data according to the ordering of the calculated log-likelihood values. Then, a recursive top-down algorithm is used to generate the minimum number of rules for accurate forecasting. Finally, a gradient descent method is applied to fine-tune the model parameters. To verify the method in real situation, an experimental model is constructed to produce traffic flow forecasting of freeway in CA, USA based on actual data.  
  关键词: HMM;Fuzzy;Short-term;Traffic;Forecast  
  下载:         下载 [6 ]  
  vol   1 (1)  :1856
 
   234. Based on the Improved K-Means Algorithm of Tianjin Port Traffic Flow Characteristic Analysis
    作者姓名: Zhongzhen Yan, Xinping Yan, Ming Huang, Lei Xie, and Zheyue Wang  
  摘要:   Mastering the characteristics of port ships traffic flow is the premise to plan, operate, and control waterway and navigation reasonably. Therefore, analysis of traffic flow characteristic of port ships is necessary and extremely important. Because Vessel traffic flow data acquisition methods are diverse, they contain flawed and incorrect data. To solve the problem, we made use of the improved K-means algorithm to prove the raw data of sequence samples. We applied data mining clustering analysis method to the Tianjin port ships traffic flow data characteristic for analysis. The results show that some valuable information is obtained by the proposed method which can also provide decision support for maritime safety administration.  
  关键词: 数据挖掘;交通流;聚类分析;K-means算法  
  下载:         下载 [6 ]  
  vol   1 (1)  :1863
 
   235. An Optimization Model for Determining Bus-Stop Spacing Considering Environment Factor
    作者姓名: Jing Gong, Xinping Yan, and Chaozhong Wu  
  摘要:   The spacing of transit stops clearly affects the operating time of public transportation system, passenger travel times and vehicle emissions. A model for determining bus-stop spacing is proposed to optimize the travel time of passengers, transit operation cost, and traffic pollution in urban areas. The relationship between bus-stop spacing and vehicle operation is established from analysis of bus operation process. The amount of pollution from vehicles is calculated by putting the required time-velocity input data into mobile emission model. Finally, a bus-stop spacing model is generated aiming at minimizing passengers total travel time cost, the transit operation cost and traffic air pollution cost. A corresponding genetic algorithm is also suggested as a solution. A bus route in Wuhan is examined as an example and the results show that the optimizing method is efficient and practical.  
  关键词: Bus Stop Spacing; Passenger Cost; Transit Operation Cost; Environment Cost  
  下载:         下载 [6 ]  
  vol   1 (1)  :1871
 
   236. A Fine-Grained Localization Scheme of Wireless Sensor Networks Using the Multi-Energy Level Effect of Mobile Robot
    作者姓名: Ji Xiong, Kezhong Liu, Zhiyong Lu, Xiaodi Peng, and Huarong Zhen  
  摘要:   The issue of node location and energy consumption in the sensor network is very important Because of the rapid development of robot technology; it is possible to use a mobile robot for fine-grained localization. Mobile robot can broadcast multi-energy-level signals to realize the estimation of accurate location of the unknown nodes and collect the related data. The unknown node receives the broadcasted message from the mobile robot, and then the unknown node will compare the power of received information to the power level of the mobile robot, because the power of energy level of the mobile robot increases from far to near. Unknown nodes can use the comparison of the power of energy level to judge the position of the mobile robot and in which energy level it is. The simulation results show that the proposed accurate positioning algorithm can well achieve our desired result.  
  关键词: Sensor Networks; Energy Consumption; Energy Level; Location  
  下载:         下载 [6 ]  
  vol   1 (1)  :1879
 
   237. Research on Safety Evaluation for Overweight/Oversized Cargo’s Transportation on Road
    作者姓名: Cheng-qiang Zong, Zhi-yong Lu, and Jiang-tao Li  
  摘要:   Overweight/oversized cargos become more common in cargo transportation. Improper transportation leads to the damage of vehicle, cargo, road and traffic facilities. This paper developed one convenient method to evaluate the safety of overweight/oversized cargo's transportation on road. It combines with advanced sensing technology and analytic hierarchy process (AHP). Vehicle carries sensors which collect information of road and environment, such as slop, width of road and height of obstacle, and weights of influence factor are according to the importance to safety transportation, all data is compared by decision-maker and analyzed by AHP, and then the degree of transportation safety is given by decision-maker.  
  关键词: safety evaluation, analytic hierarchy process, overweight/oversized cargo  
  下载:         下载 [6 ]  
  vol   1 (1)  :1890
 
   238. Exploring Teenagers’ Travel Behavior for School and After-School Activities: Implications on Safety
    作者姓名: Maria Kamargianni and Amalia Polydoropoulou  
  摘要:   The main objective of this paper is to highlight teenagers’ driving behavior and travel patterns to school and after-school activities and investigate the factors that affect the mode choice for these trips. Teenagers’ daily travel behavior (to school and outside school), driving behavior, culture and values, perceptions and attitudes, socio-economic characteristics, activities and social networking are examined. A case study on high school students’ travel and driving behavior is developed for the island of Chios in Greece. Analysis of the data collected demonstrates that teenagers prefer to use motorized vehicles, either as drivers or as passengers. Also, the model estimation explains that students’ activities, personal allowance and involvement in traffic accidents affect travel behavior. The findings of this research are discussed in relation to measurements for increasing active travel to school, safety awareness and change of travel and driving culture among high school students.  
  关键词: Teenagers, Travel Behavior, Active Trips, School travel  
  下载:         下载 [6 ]  
  vol   1 (1)  :1896
 
   239. A Study on Chinese Motorists’ Operational Behavior in Angry Driving
    作者姓名: Hu Lei, Xinping Yan, Chaozhong Wu, and Hui Zhang  
  摘要:   With the increase of vehicles in China and the participation of young novice drivers, more and more emotional conflicts are caused by drivers. Some even attack people and other vehicles to vent their anger which is known as road. In order to study the characteristics of road rage and the process of identification of anger level, twenty male drivers were recruited in Wuhan, and asked to complete Driving Anger Scale (DAS). Ten drivers who scored higher were invited to do driving experiment on road rage in real traffic environment. The throttling, clutching, steering angle, engine speed, gear and velocity are analyzed particularly. The results show that in angry driving (1) the operation of the vehicle is more frequent, (2) the operation range is large and uneven, and (3) steering wheel angle change is more obvious.  
  关键词: angry driving; road rage; traffic safety; driving behavior; driver anger  
  下载:         下载 [6 ]  
  vol   1 (1)  :1905
 
   240. Design of Virtual Dynamic Traffic Events for Driver Safety Awareness Training
    作者姓名: Ying Zhou, Chaozhong Wu, Song Gao, and Yu Wang  
  摘要:   Driver behavior is an important factor for traffic safety. Enhancing driver safety awareness is an efficient method to reduce traffic accidents. Instead of real vehicles, driving simulator can be employed to simulate dangerous traffic scenes for driver training. In this study, typical traffic scenes with dynamic events were designed. Dynamic events were divided into motion states to describe the behavior of event-participants. Based on vehicle dynamics characteristics,the event occurrence timing and event-participants’ actions were calculated according to vehicle’s real-time speed and position. As an example, the event of Pedestrian Crossing Street (PCS) was designed in the virtual traffic scene. A driver can drive in the virtual traffic scenes and experience dynamic dangerous events. This developed stimulation training can increase driver safety awareness and improve driver skills when facing dangerous traffic situations.  
  关键词: Traffic safety, Safety awareness , Virtual traffic scene, Dynamic event, Driving simulator  
  下载:         下载 [6 ]  
  vol   1 (1)  :1912
 
   241. Research on Longitudinal Spacing Control for a Simulated Vehicle Platooning System
    作者姓名: Xinyu Liu, Yulin Ma, Qing Wu, and Xinglong Liu  
  摘要:   A platoon of closely spaced vehicles is one of the important issues in Intelligent Vehicle-Highway System (IVHS). The object of the platooning system is to guarantee the platooning safety, stability, as well as comfort on maintaining a close spacing between vehicles. It is obviously important to develop longitudinal control algorithms in control of the close spacing. In this paper, the platoon driving process is analyzed. According to vehicle dynamics and the definition of safe distance, spacing deviation model is made considering vehicle position, velocity, and acceleration. And, a fuzzy sliding mode controller is designed for longitudinal spacing control. The proposed controller guarantees not only individual vehicle driving stability, but also platooning stability with respect to unknown time varying disturbance. Simulations are made for the longitudinal spacing control between the preceding car and the controlled one, which illustrates the good performance of the proposed controller.  
  关键词: Intelligent vehicle highway system, platooning system, longitudinal spacing control, fuzzy sliding mode control  
  下载:         下载 [6 ]  
  vol   1 (1)  :1919
 
   242. An Improved ANN Algorithm for Traffic Sign Recognition
    作者姓名: Qinfang Chai, Xianqiao Chen, and Pinfu Yang  
  摘要:   An automatic traffic sign recognition system can help drivers operate the vehicle properly. Most existing systems include a detection phase and a classification phase. In this paper, a new classification method is presented based on an improved ANN algorithm for recognizing traffic signs. When the ANN algorithm is chosen to for traffic sign recognition, the key factor is to get the right weights in neural networks. Traditionally, the weights were solved by training the neural networks with a give samples set. But in most of the cases the convergence for the training is very slow, even it becomes divergence. In this paper, an improved BP neural networks algorithm was proposed. Compared with the old algorithm, a dynamic learning rate was used to get an optimization learning rate instead of a fixed learning rate. Combined the moment features, GSC features, experiments show that the iterative times for ANN training is reduced evidently.  
  关键词: Image Recognition; Traffic sign; Color features; structure features  
  下载:         下载 [6 ]  
  vol   1 (1)  :1929
 
   243. A Recognition Model for Acceleration Intention of Automobile Drivers Based on Fuzzy Clustering
    作者姓名: Rui Zhang, Xinping Yan, and Chaozhong Wu  
  摘要:   Automobile driver’s intention recognition is used to predict what a driver will do the next moment. Generally, driving warning system only considers environment perception, the recognition of safe distance and the warning methods, and it rarely takes driver’s intention into account. Therefore, its effectiveness and accuracy is not satisfied.According to driver’s acceleration characteristic, we analyze the driving operation behavior and vehicle status information, and propose data sequences about driver’s operation data. The data sequences are used to describe the successive driving operation data present and before, the model added by the data sequences can improve the recognition accuracy. Then, based on fuzzy clustering, a model for recognizing driver’s acceleration intention is proposed. The driving simulation experiment aiming at recognizing driver’s acceleration intention is carried out. Experiment results indicate that the proposed recognition model combined fuzzy clustering with the data sequences can effectively recognize driver’s acceleration intention. The model can be used to improve the effectiveness and accuracy of current driving warning system.  
  关键词: acceleration intention, intention recognnition, fuzzy clustering, data sequence strings, driving simulation experiment  
  下载:         下载 [6 ]  
  vol   1 (1)  :1938
 
   244. Heterogeneous Database Access Technology and Application
    作者姓名: Feng Wang and Jianming Guo  
  摘要:   With the development of modern enterprise and computer network technology, the function of integrated information platform is getting more and more attention. This paper aims at the heterogeneous database access problems that are encountered when constructing an integrated information platform. The author summarizes the methods available to solve the problems. Based on the concrete conditions in the project, the author adopts appropriate methods of heterogeneous database access to fulfill the engineering requirements. Besides, the advantages and disadvantages of this method and several special aspects that should be paid attention to when using the method are analyzed as well in this paper.  
  关键词: Heterogeneous databases, Oracle, SQL server  
  下载:         下载 [6 ]  
  vol   1 (1)  :1948
 
   245. A Recognition Method for Lane Change Intention Based on Hidden Markov Model
    作者姓名: Wang Xu, Xinping Yan, and Chaozhong Wu  
  摘要:   In order to reduce drivers’ misbehavior and errors, various driving assistance systems (DAS) are designed to provide effective warnings and alarms when dangerous traffic condition occurs. When designing accurate DAS, it is significant to recognize drivers’ driving intentions, especially lane change intention, by combining the information of vehicle state and driver’s behavior. In this study, a driver’s lane change intention recognition method is proposed. The driver’s lane change intention is recognized by Hidden Markov Model (HMM), with various inputs of vehicle acceleration, turn signal condition and steering wheel angle. The model is validated by implementation of simulation for verifying the recognition accuracy and efficiency on a driving simulator. The results of experiment indicate that lane change intention can be recognized efficiently by the model established.  
  关键词: lane change intention; driving behavior; Hidden Markov Model; driving simulator  
  下载:         下载 [6 ]  
  vol   1 (1)  :1955
 
   246. Strategic Considerations for Low-Speed Transportation Systems in Urban Street Networks in Megacities in China
    作者姓名: Shengdi Chen and Jian Lu  
  摘要:   Low-speed transportation systems have great potential in megacities such as in Shanghai, China, as they could reduce travel demand for motorized traffic and produce significantly less carbon emissions as compared with other transportation modes. Low-speed transportation systems have significant advantages over other motorized transportation systems, such as low carbon emissions, low energy consumptions, low noise, and less roadway damages. To encourage the use of low-speed transportation systems, strategies and technologies should be developed with the considerations of safety and operational performance improvements to low-speed transportation system users. This paper aims to discussing technology considerations for developing safe and efficient low-speed transportation systems. The key technology approaches that could be used to enhance low-speed transportation system performances include: (1) behavior analysis of vulnerable users, (2) analysis of operational and safety characteristics of vulnerable users, (3) planning methods for low-speed transportation systems, (4) safety design of low-speed transportation infrastructures, (5) model development for safety evaluation of low-speed transportation systems, and (6) safety improvement program for low-speed transportation systems.  
  关键词: Low-Speed Transportation System, Vulnerable Users, User Behavior, Low-Speed Transportation Infrastructure, Safety Evaluation of Low-Speed Transportation System  
  下载:         下载 [6 ]  
  vol   1 (1)  :1964
 
   247. An Integrated and Multidisciplinary Approach for Studying Use and Acceptance of New Driver Support System: The French National Project on Intelligent Speed Adaptation (LAVIA Project)
    作者姓名: Sylvain Lassarre and Farida Saad  
  摘要:   Speeding on the roads is acknowledged as a serious societal and public health issue in all countries. During the last twenty years, much research has been devoted to studying the potential impact of new driver support system, such as Intelligent Speed Adaptation (ISA) systems for contributing to solve this issue. The aim of this paper is to present the multidisciplinary and integrated evaluation process of the French project on ISA (the LAVIA project). The LAVIA systems were evaluated on the basis of four main dimensions: usability, usefulness, acceptability and safety. Definitions of the four dimensions are given and the survey, measurement and observation methods that were employed to evaluate them are presented. The main results obtained and their contribution to the overall evaluation process are presented and discussed.  
  关键词: Intelligent Speed Adaptation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1971
 
   248. Experiments Carried Out on Asphalt Pavement Including LAM Base
    作者姓名: Jintian Tong and Wei Wang  
  摘要:   Static and moving loading tests were carried out respectively on an experimental pavement including LAM (Large-stone Asphalt Mixture) base in order to find out a proper stratum structure against rutting and reflection cracks under the traffic of heavy axle-load trucks. The test results and analysis were presented. It is found that an asphalt pavement including LAM base with proper thickness is helpful to overcome the said pavement damage.  
  关键词: LAM base, pavement  
  下载:         下载 [6 ]  
  vol   1 (1)  :1979
 
   249. Development and Optimization of a New Occupant Restraint System for Improving Mini Vehicle Safety
    作者姓名: Zhigang Li, Jinhuan Zhang, Qingxin Lai, and Chunsheng Ma  
  摘要:   With the increasing number of vehicles, transportation safety has become an important issue globally. Compared to other vehicles, mini vehicles usually don’t meet the requirement of safety regulations due to its compact occupant space. Moreover a mini vehicle is usually designed without an airbag. In this study, a new complete facet occupant restraint system (ORS) model of a mini vehicle without airbag is studied. An improvement for this was considered by comparing the mini vehicle to a multi-body model, was developed using MADYMO and validated against partial test data. Optimization technique was used to determine the optimum parameters of ORS. Results show that seatbelt stiffness is the most significant factor for head injuries in drivers. For a compact mini vehicle with high stiffness and without airbag, high seat belt elongation, low collapse force of collapsible steering column less than 2500 N can effectively reduce the injury of driver in frontal crash.  
  关键词: Mini vehicle; Occupant restraint system; MADYMO; Injury criteria  
  下载:         下载 [6 ]  
  vol   1 (1)  :1985
 
   250. A Real-Time Hybrid Method for Head Pose Estimation
    作者姓名: Kun Xu, Yufen Sun, and Gang Liu  
  摘要:   In this paper, we propose a hybrid method for head pose estimation which combines flexible method and tracking method. Firstly, flexible method detectes the frontal face of a driver and locates the position of feature points. Then the optical flow method is used to track these points, and head pose is calculated according to their tracking position. Our method has been tested with a head pose database. The results show it can perform well when the rotation angle of head is small.  
  关键词: head tracking, ASM, optical flow method, RANSAC, head pose estimation  
  下载:         下载 [6 ]  
  vol   1 (1)  :1993