Journal of Transportation Systems Engineering and Information Technology

Medium and Low Speed Meglev Rail Technology in Japan and Its Potential Applications

SHI Ding-huan

2007, 7(5): 1-4 .

Abstract ( )

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Based on the current situation of Chinese traffic and transportation, this paper analyzes the actual demand of Medium and Low Speed Meglev rail technology in China. The general development of Meglev technology research in China is reviewed. From the investigation of the Meglev rail technology in Japan, organized by the author, this paper points out the differences and their own characteristics of the Meglev technology in China and Japan. Then, it presents the characteristics of Japanese Meglev rail technology and the potential applications in China.

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Research on Government Dominant Mode of Comprehensive Transportation Information Platform

Xu Yan, Chen Zhihong, Du Yong, Wang Gang, Zhang Ke

2007, 7(5): 5-8 .

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The development of Comprehensive Transportation Information Platform at home and abroad can be generally divided into three modes, including: government dominant mode, government construction- privacy operation mode, and government guidance-privacy operation model. In this paper, the development of Beijing Comprehensive Transportation Information Platform and correlative information service systems is analyzed. Based on the analysis, the government dominant mode of Comprehensive Transportation Information Platform is studied in detail, including: construction mechanism, operation mechanism, service mechanism and sustainable develop mechanism. In addition, the advantage, disadvantage and applicability of the government dominant mode are studied.

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Method Research on Measuring the External Costs of Urban Traffic Congestion

Luo Qingyu, Juan Zhicai, Sun Baofeng, Jia Hongfei

2007, 7(5): 9-12 .

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The main reason for congestion pricing is the external cost of congestions. Qualitative and quantitative analyses of the external cost which urban traffic congestions bring are the base of congestion pricing. Firstly, this paper analyses the production mechanism of urban traffic congestions: travelers overlook the negative externality of urban traffic congestions and join in the congested queues. Then, the external cost of traffic congestions are divided into four parts: extra travel time cost, environmental pollution cost, traffic accident cost and fuel consumption cost. Consequently, an intensive study of the quantitative measurement for those four kinds of external cost is made. Also, a sample case is introduced to prove the feasibility of this method. It supplies a basis for the implement of urban road congestion pricing and other travel demand management strategies.

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Adaptability Measure Model and Case Study for
Areal Highway Transportation System

Hou Deshao, Yan Kefei, Jia Qiang, Liu Wusheng

2007, 7(5): 13-17 .

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Based on the concept of adaptability, the harmony coefficient (HC) measure model, including the efficacy function, the HC function and the assessment of HC, are constructed using the synergetic principle. The appraised index of the model is also established on the areal highway transportation system (HTS). Then, the model is applied to the HTS of Shandong Province according to the related data from 1996 to 2004. The analysis results demonstrate the areal HTS is unadapted during the period, which results from the disharmony among the social economy, the highway infrastructure and the transportation. The contribution of population, the ratio of the primary industry and the investment scale of the passenger station and freight station to the HC is low.

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A Review of Pedestrian Traffic Control at Signalized Intersections

Shao Chunfu,Chen Xiaoming

2007, 7(5): 18-23 .

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Increasing importance has been attached to pedestrian traffic, which is a healthy and sustainable alternative to automobile transportation. Pedestrian signal control is an effective measure to ensure that pedestrians and vehicles can cross the signalized intersections efficiently and safely. The recent developments of the studies on the pedestrian pretimed signal control are summarized and reviewed in this paper, and pedestrian signal timing design procedure is proposed. The discussion for the future research in this field is also presented.

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The Application of the Advanced Public Transport System (APTS) in Cities of China and the Prospect of Its Future Development

Zhang Guohua Li Ming Wang Jingia

2007, 7(5): 24-30 .

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Intelligent Transportation System (ITS) is the most important approach accepted worldwide to solve the problem of traffic congestions in cities with distinctly low cost-effectiveness ratio. Advanced Public Transport System is one of the most important parts in the Urban Transportation System, and many attempts related to the application of Advanced Public Transport System (APTS) have come forth during recent years. In this article, the present status of the application of Advanced Public Transport System (APTS) in cities has been analyzed. It also includes an analysis of the possible future application and improvement of APTS based on the present situation in China.

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The Study of Probe Sample Size Model of the Probe Vehicle Technology

Wang Li, Zhang Hai,Yu Guizhen, Fan Yaozu

2007, 7(5): 31-36 .

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In this paper, market penetration of probe vehicles for real-time traffic data collection is discussed. A new integrated probe market penetration model satisfied the need of traffic flow parameter estimation and traffic network coverage is established, in which many indexes like location error, probe data transmission interval, probe data analysis interval, traffic flow density, link length and link type are included. Based on this model, this paper has proved the relationship between the probe vehicle market penetration and other indexes when probe data uses for link average speed estimation based on VISSIM simulation. The simulation result shows that the market penetration model could provide effective probe information to accomplish the estimation of link speed.

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Traffic Incidents Detection Based on Boosting Method

Sun Xi, Li Xiamiao

2007, 7(5): 37-41 .

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A novel method is proposed for traffic incidents detection based on boosting fuzzy classification. The fuzzy rule and the weight have been obtained using boosting method and Genetic algorithm in an incremental fashion. The classified using aggregate the castled votes to carry through the classified decision-making. Finally we have simulated with Mat lab and found out that the algorithm can detect incidents fleetly using a few samples.

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Phases Identification of Urban Freeway Traffic on Based Statistical Properties

Guan Wei, He Shuyan

2007, 7(5): 42-50 .

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At present, researches on traffic flow theory mainly focus on highway traffic, which is significantly different from urban freeway. Because traffic science is an “empirical science”, based on actual traffic flow data of urban freeway, the statistical features of velocity distribution at different density have been investigated in this paper. Then, four steady phases: free flow, coherent-moving flow, synchronized flow and jam are identified in flowrate-density plane of traffic flow. Finally, features of the four phases as well as functional forms of phase boundaries have been discussed in detail.

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DEVELOPMENT AND COMPARATIVE EVALUATION OF RAMP METERING ALGORITHMS USING MICROSCOPIC TRAFFIC SIMULATION

WINYOOPADIT Sarintorn

2007, 7(5): 51-62 .

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Freeway ramp metering is an efficient freeway control that can ameliorate freeway congestion by limiting the number of vehicles entering the freeway. This study presents development and comparative evaluation of five ramp controls including no control, time-of-day plan and three well-known ramp metering algorithms; ALINEA, FLOW and Stratified Zone through the use of microscopic traffic simulation. In this paper, ramp controls were developed and evaluated using Microscopic Traffic Simulation, AIMSUN NG. The simulation model of the Pacific Motorway in Queensland, Australia was used as a test-bed model. The results from the study indicated that ramp metering basically was found to be able to improve network performances up to 40 percent compared to no control. In terms of network and freeway mainline performance, ALINEA was superior to other algorithms under both normal and high traffic demand while Stratified Zone was the best algorithm for on-ramp performance. In terms of on-ramp performance, ALINEA was found to generate the lowest on-ramp performance. FLOW was found slightly superior to Stratified Zone. However, the trend was opposite for on-ramp performance. Gini coefficient was applied to measure the road user equity under the implementation of different algorithms. The results showed that FLOW was the most equitable algorithm while ALINEA was the worst. The results also indicated that network performance and on-ramp performance were trade-off in presence of ramp metering operation.

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A Model and Method for Bottleneck Identification and Capacity Integration Equilibrium Distribution in Trunk Road Networks

Jiao Haixian, Hu Yingpeng, Liu Yizhou, Gong Weiyong

2007, 7(5): 63-67 .

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In this paper, the analysis model and method for network capacity equilibrium based on virtual road networks have been proposed. Traffic burdens of the virtual road networks taken as several eigenvectors, a combined model of technology of PA back stepping and a model of traffic equilibrium assignment have been adopted, based on the virtual road networks, to identify the “real bottleneck points (lines or regions)” in the networks and gain a set of capacity equilibrium matching parameters between supply and demand of the networks. Based on this set of matching parameters, systemic deficiencies of the current networks have been diagnosed. A new theory and method for systemic analysis has been proposed to evaluate the level of macro matching between urban trunk networks and traffic demand, develop measures for reducing traffic congestions, synthetically distribute and improve the capacity of the networks under equilibrium.

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Research of Train Energy-saving and Evaluation of Schemes
of Urban Mass Transit

LIU Hai-dong, MAO Bao-hua, DING Yong, JIA Wen-zheng, LAI Shu-kun

2007, 7(5): 68-73 .

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In the urban rail transport, factors impacting the train operation energy consumption include the performance of train traction and breaking, the train weight, the condition of line, the mode of signal blocking and the mode of train control. The train can achieve energy saving by changing the relevant conditions. By the case design and the system simulation, this paper focuses on the influence of the line conditions on the energy saving of the urban rail transit. This paper studies energy saving from the curve(especially small radius curve), the ramp(divided into upper and lower ramp) and the train weight. The paper also analyses the energy saving condition of the energy-saving slope, and gets energy-saving programs suitable for different section conditions.

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Research on Methods of Assessing Pedestrian
Level of Service for Sidewalks

Tan Dandan,Wang Wei,Lu Jian,Bian Yang

2007, 7(5): 74-79 .

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The sidewalk is an important part of urban pedestrian transportation system, the service quality of which influences the attitude of townspeople towards walk. Different from the traditional research on level of service for vehicle measured by the traffic operational conditions, this paper has taken pedestrian comfort and safety into consideration, studied the method of assessing pedestrian level of service by analyzing the relationship between subjective perceptions of pedestrians and the conditions of the road physical devices as well as the traffic flow operation. The paper has determined the primary factors which influence the pedestrian level of service for sidewalks on the basis of massive data in statistic method by using SPSS, and then developed the step-wise regression model along with the standard for compartmentalizing pedestrian level of service on the basis of the main factors.

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Disaggregated Model-based Changchun Residents’ Travel Times Data Analysis

Fu Xiaoyan, Juan Zhicai, Zong Fang

2007, 7(5): 80-84 .

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The Travel Generation Model of the Four Process Model System is one typical aggregated model, which simply forecasts the travel generation times and travel attraction times of every travel zone in the research district. It does not consider well the travel times of every resident, and it just does the sum of the travel times of the zone residents It can not reflect the effect of the individual and social factors and other factors on the residents’ travel times. According to the 2003 Changchun data, the paper utilizes the disaggregated theory to formulate disaggregated travel times forecasting model to analyze the residents’ travel times, then it has made the sensitivity analysis of the residents’ travel times. At last it has calculated the individual travel time expectation. It is a beneficial research on the integrative study and application of the disaggregated model and the Four Process Model System.

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Analysis on Trip Characteristics of Taxi in Suzhou Based on OD Data

Li Yanhong, Yuan Zhenzhou,Xie Haihong, Cao Shouhua,Wu Xianyu

2007, 7(5): 85-89 .

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Taxi is an important part of urban public passenger traffic system. Based on the general methods of taxi OD data, this paper introduces the techniques and results of the trip analysis basic characteristic, the trip analysis of time distribution and the trip analysis of space distribution. And then taking Suzhou as an example, this thesis contrasts the trip characteristics of taxi in common workdays, weekends and holidays. Accordingly, it has provided ecumenical methods and models for the analysis of OD data.

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The Application of Stated Preference Survey on
Traffic Mode Split Model

Wang Fang, Chen Jinchuan, Zhang Dexin

2007, 7(5): 90-95 .

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SP survey is very popular in transportation research in countries except of China now. This paper gives a general description of the different concepts of RP and SP survey firstly. Due to the relativity between RP survey data, it is very difficult to calibrate the value of time in mode split model. This paper takes Beijing SP survey for an example, analyses the reason why the value of time is not easy to calibrate, and adopts SP survey to get enough data. Finally, the authors accurately calibrate parameters of the value of time and the accuracy of the model has been improved.

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Auxiliary Lane and Channelization Length of Urban Expressway Exit Obtained with Simulation Method

Wang Zhenbao,Gu Nan, Li Jinshan

2007, 7(5): 96-101 .

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The rational length of auxiliary lane and channelization of urban expressway exit have an important role to increase the exit capacity and decrease the influence to expressway traffic flow from exit. The previous entrance and later exit style exit of diamond interchange have been surveyed, and the traffic flow data has been collected. VISSIM microcosmic simulation model is calibrated and validated through using survey data, and the exit of diamond interchange simulation model is built. Through using simulation trial, the author has analyzed the trial result and worked out the recommendation value of auxiliary lane and channelization length of urban expressway exit.

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An Improved Simulated Annealing Algorithm for Delivery Route Selection

Zang Xueyun, Xie Xiang, Guan Zhongliang

2007, 7(5): 102-105 .

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Rational delivery route can improve the efficiency of logistics distribution. Optimal route selection method based on heuristic algorithm is a research hot in recent years, aiming at the slow convergence rate of traditional simulated annealing (SA) algorithm. This paper has provided an improved algorithm which uses the guiding knowledge generated by last SA procedure as the basis to select the nodes at next simulation. This method can improve the speed of SA algorithm. Our method has been tested with different delivery nodes, and the results show that improved SA algorithm based on guiding knowledge can obtain faster convergence rate and get better optimal solutions.

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The Evaluation Method of Concrete Pavement System

Ge Honghai,Xu Jinyu

2007, 7(5): 106-109 .

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The concrete pavement system is a complicated mechanical system, which is composed of the car load, pavement and foundation. The research on the parameter identification method for the system is an important category in the transport engineering. In this paper, an approximate analytical solution for the concrete pavement system under multiple wheel loads is obtained. An optimization algorithm is employed to identify the correlative parameters, and the objective function is constructed by comparing with the measure displacement curve and computing displacement curve. According to this optimization algorithm, we can obtain the thickness, bending rigidity and foundation response modulus conveniently. This parameter will play an important role in evaluating the strength of the pavement. In order to show the application of the method developed in this paper, an actual concrete road has been investigated, and the results has shown a good agreement with the experimental results.

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Changes Research on Spatial Distribution of Resident Trips Based on Information Entropy

LIN Hong, LI Jun

2007, 7(5): 110-114 .

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Based on analysis of information entropy, this paper puts forward that information entropy can describe the spatial distribution changes of one city’s resident trips better than OD desire line in different periods. A case study in Guangzhou draws out conclusions that the increase of equilibrium degree of spatial distribution from 1984 to 1998 is mainly due to the improvement of Guangzhou’s internal function and its inconspicuously decrease from 1998 to 2005 is mainly due to the extending of region scale and the change of city configuration.

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Study on Gansu Province Highway Traffic Developing Strategies

Lei Ming-tao

2007, 7(5): 115-120 .

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Based on the important geological location of Gansu Province, by analysis in a systematic way of the present state of the comprehensive transportation situation，the existing problems，the characteristics of highway traffic and its vital role in the northwest area, this paper has proposed the strategic constructing alternatives and main points for harmonious and sustainable highway development in this province so as to bring the highway development of Gansu into accord with the government’s strategy of building a well-off society and of constructing a harmonious socialist society in an all-round way.

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The Evolution of Urban Traffic Network of Dalian
Based on the Gather Fractal Feature

Guo Jianke, Han Zenglin, Xu Yan

2007, 7(5): 121-126 .

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The fractal theory has already become a powerful tool in studying the city form complexity. Compared with other fractal research on city system and the transportation network in the region, the fractal researches on traffic network in the single city interior are few. According to the Dalian foundation map of 1:20000 in 1980, 1995 and 2004, this article has used the method which the length-radius and the branch-radius unify to portray the space and temporal evolution of urban traffic network in Dalian. The result indicates that, along with the city scale expansion and the urban network advancement to the suburb, the fractal characteristic of urban traffic network in Dalian is more and more obvious in time and space. The difference between the interior and exterior of the main urban area has reduced and the network connectivity has enhanced largely, but never has the obvious fractal characteristic in non-scale area changed obviously. This is related to the unique terrain and landform in Dalian. Simultaneously，the result also indicates that, during the evolution of the urban form in Dalian , the main urban area development has changed into the function replacement stage from the scale expansion stage. The group of urban areas taking the main city as the center relates closely to each other and develops on interaction. Finally, this article has embodied the particularity of the fractal theory application on urban traffic network in such port cities as Dalian based on the comparison with the research made before.

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Study and Realization of a Railway Yard Topological Relationship Data Generation Method

Zhao Yan, Zhong Yan, Wang Futian

2007, 7(5): 127-134 .

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Based on the research of railway yard data while developing integrated dispatching system included organization of train operation, train control, security and alarm, this paper has brought forward the method and key arithmetic to establish railway yard topological relationship data. According to the railway equipment setting rules, using Geography Information System technology, the tool for establishing railway yard topological relationship data has been developed, and using this tool the yard topological relationship data has been established correctly.

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Evaluation of the Public Bus Network in Beijing

Wang Yunjing, Li Qiang

2007, 7(5): 135-141 .

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Public bus plays an important role in resolving urban traffic congestions. The study has selected such indexes as: line length, network density, repetition coefficient, non-linear coefficient, stop density, average distance between stops and stop coverage for the evaluation of public bus in Beijing with the support of GIS technology. It has been found that there are still some problems in the bus network, although public bus in Beijing has been greatly developing, especially in recent years. The problems revealed in the study are that the length of the line is too long on the whole and the network density is low relatively. Both the repetition coefficient and its difference in spatial distribution are large, and the indexes of non-linear coefficient, stop density and stop coverage are not consistent with the standard values. The results can help to present reasonable countermeasures and optimized projects for improving public bus efficiency.

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