Journal of Transportation Systems Engineering and Information Technology

The Bottlenecks and Strategies for Development of Intelligent Transportation System in China

SHI Jing, LI Wen-Yu

2012, 12(增1): 1-6.

Abstract ( )

PDF (423KB) ( )

This study explores the bottleneck in developing stage and relative strategy to assist the ITS development in China. To identify the bottlenecks of ITS development in China, the paper analyzes the collected data, interviews people in transportation industry and conducts investigations to analyze and compare the policy, industry and technology. The data and analysis show that ITS in China is still in starting stage. Both users’ demands and attraction to funds are in great need, on the contrary, the ratio of related completed standards is less than 20%. The infrastructures construction is still oriented toward the governors’ view to reduce management cost and to promote the management efficiency with high attraction and priority. However, the products facing normal transport participants are restricted. The technical bottleneck, such as accurate locating and controlling of vehicles technology, needs to be improved. The combination of drivers, vehicles and roads still needs development in China.

References | Related Articles | Metrics

Simulation and Analysis System of Transportation Impacts on Atmosphere

WU Jian, ZOU Jiao

2012, 12(增1): 7-12.

Abstract ( )

PDF (958KB) ( )

Using the ripe REGOZON model and simulation software from German, this paper investigates urban air pollution influence detection and information forecast with multiple area, dynamic, real-time. It integrates the data of land use, meteorological data and industry emission, and it is the first time we realize computer modeling and emulation technique in this research field. The paper analyzes the contribution factors and index of air pollution and then identifies the origin of the emission related to environment and the geography and meteorological factors. It then establishes urban environment 3D simulation system based on transportation, industry and family pollution source to evaluate the atmospheric environment and provide suggestions for traffic control, industry development and urbanism.

References | Related Articles | Metrics

Power Spectrum Improve Method and Its Applications in Speed Measuring Radar

FANG Fei-Fei, YU Wen

2012, 12(增1): 13-19.

Abstract ( )

PDF (612KB) ( )

In the spectrum analysis based on the Fourier transform, spectral resolution and spectral leakage are two key factors for power spectrum estimation. This paper analyzes the influence of non-integer-periodic truncation on the property of the two factors. It proposes the frequency spectrum refinement and frequency spectrum correction methods for intelligent transportation doppler radar signals. The algorithms such as Zoom-FFT, High-order FFT, all phase FFT (ApFFT) are realized on DSP (TMS320C5416). The simulations show the algorithms’ property respectively. The theoretical analysis and experimental results show that the high-order ApFFT and all phase ZFFT(Ap-ZFFT) can be effectively applied to different radar systems.

References | Related Articles | Metrics

Design and Implementation of ETC Integrated Chip

SUN Wei-Zhen, MA Lei, PAN Hai-Jun

2012, 12(增1): 20-24.

Abstract ( )

PDF (587KB) ( )

For the current used OBU in Chinese ETC industry, the discrete components structure always leads to system instability, and the diode peak detecting technology increase the cost. This paper studies the OBUs both at home and abroad and analyzes the National Standard, and then proposes a system integration solution. Instead of building the system with discrete components, system integration solution integrates every submodule into one single chip. It solves a series of problems such as system instability, high BOM cost and high repairing rate. The design is proven to be correction, feasibility for the by system simulation based on filed test. The design has applied several patents in China.

References | Related Articles | Metrics

Analysis and Design of Integrated Platform Based on PGIS for City Traffic Police Command

WANG Chao, YU Hong

2012, 12(增1): 25-30.

Abstract ( )

PDF (773KB) ( )

Traffic police command center (TPCC) is the center of traffic supervision, traffic control and information. The center consists of a few subsystems, for example video supervision system, traffic signal control system, alarm system, intelligent bayonet system, electronic police system, traffic acquisition and induced released system, facility management system and cardriver information system. At present, it is urgently needed to(construct a comprehensive integrated platform oriented to traffic police command. The platform aims to eliminate isolated information island, enhance the interconnection among subsystems and the emergency response capacity. Based on the analysis of the traffic police command center application business, the function of each subsystems and police geographic information system structure, this paper designs system structure of a city traffic police command integrated system through integrating each subsystem information and PGIS information. The future work was also prospected in the last section.

References | Related Articles | Metrics

Safety Evaluation of Freeway Horizontal Curve Based on Driver Workload

HU Jiang-Bi, WANG Jian

2012, 12(增1): 31-37.

Abstract ( )

PDF (2048KB) ( )

In view of driver safety and comfort, safety evaluation of index of horizontal curve on freeway is significant to road design, operation and management. Based on the theory and method of driver workload, typical vehicles (cars and trucks) are chosen for realvehicle testing with a random sample of 28 drivers. This study analyzes the data of 339 horizontal curve sections. The orderliness of driver workload degree is obtained, by which the authors classified the standard of horizontal curve. It establishes the regression model between driver workload degree and road alignment index. Combined regression model with controlling values of driver safety, index of horizontal curve is used to evaluate driving safety. Finally, the case studies of two freeways show that the evaluation method is feasible.

References | Related Articles | Metrics

A Merging Zones Safety Control System Based on VII

ZHOU Jian-Shan, TIAN Da-Xin, WANG Yun-Peng, HAN Xu, LI Yue-Guang, DUAN Xu-Ting

2012, 12(增1): 38-44.

Abstract ( )

PDF (2225KB) ( )

A vehicle safety control system in the merging zones of highway and freeway is established based on vehicleinfrastructure integration (VII).First, the present safety level of merging zones in China is reviewed, and the requirements of a vehicle safety control system are emphasized.Based on the analysis of system framework and functions, three subsystems including the traffic information collection unit of side outline, the side outline control unit and the warning and guiding unit with the safe driving signal are discussed, and then the system’s logical and physical structures are designed in detail.It then tests and verifies the feasibility and validity of the traffic video detection algorithm included in the system on Matlab/Simulink platform.Using the video processing technology based on the OpenCV and the wireless communication technology with Socket protocol mechanism, the experiment under the laboratory conditions is conducted to realize the integral functions of the system.The system establishes a firm foundation to promote the safety conditions of merging zones in China, and it proposes a valuable reference model for the design of traffic safety facilities.

References | Related Articles | Metrics

Evaluation Index of Urban Road Guide Sign Set

WU Hai-Bin, HUANG Min, RAO Ming-Lei, LI Min, SHA Zhi-Ren

2012, 12(增1): 45-49.

Abstract ( )

PDF (731KB) ( )

Referring to national standards and related rules and norms as well as the previous study, the paper discusses the analysis and evaluation of urban road guide signs sets. It presents the analysis and evaluation norm of urban road guide signs set, based on abovementioned norms, proposes several evaluation indexes about urban road guide signs set, such as guide information overload rate, various types of identification information rate, guide information classification rate, intersection road guide signs coverage rate, and so on. And then, it takes Zhujiang New Town’s trunk road network in Guangzhou province of China as a example. Based on the present road guide signs data, it calculates the evaluation indexes values, refers to the relevant standards and experience knowledge and fits with the actual situation. The results indicate that the guide signs of Zhujiang new town are basically reasonable.

References | Related Articles | Metrics

Research and Application of Integration Management Platform of Urban Traffic Signal

ZHANG Lei-Yuan, WU Xiao-Feng, XU Leng

2012, 12(增1): 50-55.

Abstract ( )

PDF (1559KB) ( )

The multitraffic signal control systems have been used in some cities of China. Due to lack of data exchange between systems, the cooperative control between the system control area cannot be formed, and it brings difficulties to the management and maintenance. In this paper, a integration management platform of urban traffic signal control is estibilished, which is based on the WebGIS technology, unified communications, open protocols and integrated different traffic signal control system. The applications show that the integration platform has the function of coordinated control of traffic signals, traffic statistics analysis, traffic signal equipmen management and maintenance. It solves the problems of the data exchange between multitraffic signal system, which benefits for interregional coordinated control and the management and maintenance.

References | Related Articles | Metrics

Calculation of Red Clearance Interval for Urban Signalized Intersection

SHU Ai-Bing, WANG Yun-Xia

2012, 12(增1): 56-61.

Abstract ( )

PDF (385KB) ( )

In signalized intersections, red clearance can reduce the conflict probability during the change interval and improve the traffic safety.This paper introduces the current situation on the red clearance both in China and other countries.It then reviews various red clearance calculation methods in the world.In view of the current traffic inefficiency and poor safety owing to the improper settings of red clearance, the paper proposes the calculation formula by analyzing the vehicle’s practical driving and tracks during the change interval.Considering the influential factors including proposed speed limit, geometric conditions, countdown display units of the intersection, etc, the paper thus improves the traffic efficiency and safety of the intersections.

References | Related Articles | Metrics

Probe Vehicle System Configuration Optimization Based on Traffic Information Coverage

WANG Xu-Tao, YAO En-Jian, QIU Feng-Cui, LI Jian-Jun

2012, 12(增1): 62-67.

Abstract ( )

PDF (1437KB) ( )

From traffic information coverage perspective, the configuration optimization of probe vehicle system is explored.First, the coverage status is analyzed based on the reviewing of existing studies.Then, a coverage model and the optimization model of the number of probe vehicle is developed considering the minimum coverage requirement, the coverage marginal contribution rate of the number of vehicles and other restrictions.Finally, the model is used to optimize the probe vehicle system of Shenyang city of China.The result shows that the model works with high reliability and portability, which leads to a prediction accuracy of 96.1%.The optimization guarantees the lowest cost and the basic requirement of the traffic information coverage, which is of great reference value for the configuration of probe vehicle system.

References | Related Articles | Metrics

Association RulesBased Characteristic Analysis of Traffic Black Spots in Beijing City

WANG Chun-Lu, JIN Bin, ZUO Xing-Quan, ZHANG Tian-Le

2012, 12(增1): 68-72.

Abstract ( )

PDF (354KB) ( )

Since the reform and opening up policy was introduced, the economy of China has grown rapidly. However, with the rapid growth in economy, the traffic problem in cities became more and more serious. It is rather necessary to solve this problem and reduce traffic accidents. Traffic black spots, are the road sects where traffic accidents often occur. It can effectively reduce the traffic accidents by analyzing the characteristics of the black spots and taking measures to reduce the black spots. This paper uses association rule to analyze the characteristics of the traffic black spots in Beijing. And based the results, effective measures can be taken to reduce the traffic black spots and improve the traffic safety of Beijing.

References | Related Articles | Metrics

Dynamic Coordinated Control Model for Oneway Oversaturated Arterial Road

XU Jian-Min, ZHENG Shu-Jian

2012, 12(增1): 73-79.

Abstract ( )

PDF (496KB) ( )

In the coordination direction of oversaturated arterial road, this paper presents an objective function of the dynamic coordinated control model to maximize the number of through vehicle by introducing the queue management strategy weighting factor. The constraints of the model are analyzed from offset, green time of the coordination phase, queue management strategy and the traffic volume leaving the intersection in the coordination phase. Four different queue management strategies are put forward to describe their specific content and analyze their corresponding weight factor formulas in each strategy. Integrating the objective function and constraints, the dynamic coordinated control model is developed for oneway oversaturated arterial road. Finally, taking the Jihua Road in Foshan city of China as the case, the data from the VISSIM simulation shows that the model can effectively reduce the queue length and delay, and improve the capacity of the arterial road as well.

References | Related Articles | Metrics

The Technology of Corresponding Points Matching of Photogrammetry in Traffic Accident Scene

LU Guang-Quan, ZHANG Zhe, LIU Wen-Chao

2012, 12(增1): 80-85.

Abstract ( )

PDF (687KB) ( )

The traffic congestion and the second accidents caused by congestion receive increasingly attentions of the society. The technology of corresponding points matching is the key of the three-dimensional reconstruction of traffic accidents scene, which is important for the reproducing of the traffic accident scene and can assist reducing traffic accidents handling time. The paper first introduces relevant knowledge of the photogrammetry and epipolar geometry. With the knowledge, the searching area of corresponding points is changed from the whole picture to a line. Then, the method of feature points’ strength factor is used, and combined the assumption of pictures’ comparability and continuity to search the corresponding point. With the foundation above, the point which is on the corresponding line and also has the biggest strength factor is the corresponding point. In the experiment of traffic accidents, this method can search the corresponding points with high accuracy.

References | Related Articles | Metrics

Causes and Countermeasures of Motor Vehicle Drivers Violations Analysis Based on Game Theory

ZHANG Wan-An, XIAO Yue-Xiu

2012, 12(增1): 86-90.

Abstract ( )

PDF (375KB) ( )

Transportation is a dynamic system, which is mainly composed by four elements: persons, vehicles, roads and environment, Persons are the main part of road traffic because they are the observers and violators of the law. From the data of road traffic accident recent years, overloading (overcrowding), overtaking and speeding phenomenon are major causes of serious accidents. This paper presents the current situation of motor vehicle driver traffic violations. And then the game theory is used to analyze the causes of motor vehicle driver traffic violations. In the last section, it discusses the countermeasures of traffic violations under the market economy conditions.

References | Related Articles | Metrics

GPS/INSBased Intersection Turning of Autonomous Vehicle

ZHU Yu-Xi, QU Chao, CHEN Hui

2012, 12(增1): 91-98.

Abstract ( )

PDF (1130KB) ( )

This paper introduces a method to realize automatic turning at intersections in urban environment based on the GPS/INS (global positioning system/inertial navigation system). It not only uses the GPS/INS to generate route network definition file, but obtains real time positioning and turning information. As the vehicle approaches the intersection, the paper utilizes waypoints which locate the end segment of the current road and the beginning segment of the next road to perform local path planning online by polynomial curve fitting. The preview follower control is used to make the vehicle following the trajectory planned to cross the intersection when secure for turning. As to the preview follower control method, the simulation of “vehicleroadcontroller” based on the Matlab/Simulink shows that the vehicle can follow the planned trajectory with smooth steering wheel angle curve which can be conducted by steering system. Finally, field test shows that by applying this method, the unmanned vehicle with EPS can turn autonomously at intersections.

References | Related Articles | Metrics

Traffic Safety System of Interchange on Expressway

HU Jiang-Bi, ZHU Qiang-Bin

2012, 12(增1): 99-105.

Abstract ( )

PDF (2067KB) ( )

With the rapid development of economic and road transportation industry, freeway expansion may become the new hot spot for future road construction. In the expressway unilateral widening project retaining median barrier of the primary road, only in the interchange and service area near the entrance to the central median cut openings for vehicle access, which can greatly reduce the difficulty of construction, save the cost of the project, and improve vehicle operation the safety and comfort. To ensure program reliability of vehicle running into the openings, interweavement theory, traveling through space theory and queue theory are used to analyze program of median barrier opening length. Traffic control scheme is proposed based on the road traffic psychology, traffic engineering, road traffic safety engineering and driver safety, and comfort, etc. The theory of driving workload and simulation experiments verify that the technical solutions is safe and comfortable.

References | Related Articles | Metrics

Traffic State Evaluation Method for Guangzhou Urban Road Network and Its Application in the 16^th Asian Games

GONG Jun-Feng, SU Kui, HE Zhao-Cheng, SHA Zhi-Ren, CHEN Xiao-Xiang

2012, 12(增1): 106-112.

Abstract ( )

PDF (574KB) ( )

To analyze traffic state of large urban road networks, a network scaled traffic state evaluation method is proposed for Guangzhou city. It is based on the comparative analysis of the evaluation research of traffic operation and traffic congestion. The core of the method is the spatiotemporal accumulation of traffic congestion according to the average travel speed of road sections. Consider different weights of different road sections, the congestion index and the mobility index are used to analyze traffic congestion and mobility performance. Through calculation of the indicators, the results show the effect of the traffic management of 2010 Guangzhou Asian Games, including the traffic congestion and traffic mobility features. Empirical analysis shows that combination of network scaled congestion and mobility index is more sensitive than average travel speed of road sections and can reflect the actual traffic state from different aspects.

References | Related Articles | Metrics

Research and Implementation of GISBased Comprehensive Display System for Track Detection Data

XU Xiao-Lei, WANG Ying-Jie, LU Wen-Long

2012, 12(增1): 113-118.

Abstract ( )

PDF (1853KB) ( )

Recent years, with the largescale speeding up of railways, the improvement of railway lines and with the increasing emphasis on the importance of safety, the existing track detection system highlights some problems in analyzing and processing detection data initiatively, quickly and effectively.On the foundation of ArcGIS Server of WebGIS, the system based on GIS is established to comprehensively display the track detection data to solve these problems.With the rapid and comprehensive analysis and effective processing of the track detection data, this system realizes the intuitive display, friendly interaction and realtime effectiveness of the interface of the track detection system.

References | Related Articles | Metrics

Application of EMU Maintenance Equipment Management Integration Based on BPEL

JIA Zhi-Kai, DAI Jun, LI Jin-Bo

2012, 12(增1): 119-123.

Abstract ( )

PDF (554KB) ( )

The equipment maintenance management is an essential subsystem of the EMU maintenance management system. It ensures the effective and safety operation of the maintenance works. With the wider and deeper application of the equipment maintenance management system, simple work system can no longer meet the demands for mutifunction, mutibussiness and mutisystem, and it is rather important to design good web services to complete the business process and provide support of theequipment maintenance management. The paper analyzes the features of the BPEL language specification. The business process integration based on the BPEL of EMU maintenance equipment management are discussed. With the actual business process of EMU maintenance equipment, the design and implementation are presented. It improves the flexibility of EMU maintenance equipment maintenance management.

References | Related Articles | Metrics

Cloud ComputingBased Framework Research for Railway Data Center

LI Lei, MA Xiao-Ning, LI Ping, WANG Fu-Zhang

2012, 12(增1): 124-128.

Abstract ( )

PDF (558KB) ( )

This paper points out the shortcomings of information technology from the aspect of business requirements. It proposes the concept of building railway data center of cloud computing. From the technical and function the paper concludes the necessity of building railway data center based on cloud computing. Then it bring forward concept and connotation of the railway data center based on cloud computing, advances the overall structure of the railway data center based on cloud computing, puts forward the logic framework of platform of cloud computing of the railway data center and the system structure of cloud computing of the railway data center. Finally, it views the prospects of cloud computing in railway information services.

References | Related Articles | Metrics

Research and Application of System Architecture of Emergency System for Urban Rail Transit

LI Ping, WANG Fu-Zhang, WU Yan-Hua

2012, 12(增1): 129-135.

Abstract ( )

PDF (2052KB) ( )

As the most important part of the entire intelligent transportation systems, the capacity of early warning and emergency support function in urban rail transit are more concerned.In this paper, the risk on natural disaster, accidents, public health and social security is deeply analyzed, and a model of emergency management is proposed.The model is constituted by prevention, preparedness, response and recovery.Then, the function and the process of urban rail system is established.The system includes net layer, hardware layer, data resource layer, information processing layer, interface layer, business application layer and access layer.Finally, the application of emergency management system in Guangzhou metro is introduced.

References | Related Articles | Metrics

Railway’s Earthquake Monitoring Technology

WANG Rui, SHI Tian-Yun, WANG Tong

2012, 12(增1): 136-140.

Abstract ( )

PDF (2576KB) ( )

It is necessary to establish the earthquake monitoring and emergency system by analyzing the important function of Shinkansens seismic emergency system on the Earthquake in Japan.The paper sets the cutoff frequency of the filter after analyzing the true earthquake data from China strong motion networks center.The method of Pwave recognition technology is proposed based on the low pass filter, STA/LTA algorithm, V/H algorithm and simulate the algorithm.Based on this, it suggests the earthquake alarm way based on the Pwave early warning and Swave alarm which fits for the railways in China.It also analyzes the alarm conditions in different circumstances.In the last part, the paper shows the earthquake monitoring and emergency system, which is constructed by three layers architecture.For maintaining the timeliness of systems alarm, it sets emergency disposal actions on the monitoring units along the line.The instructive significance of proposed system scheme is applicable for engineering construction.

References | Related Articles | Metrics

Archive