Journal of Transportation Systems Engineering and Information Technology

WTO Rules，Transport Investment
and Financing Policy of China

WANG Qing-yun

2002, 2(4): 1-4 .

Abstract ( )

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In the past twenty years, China has made great performances in the fields of transport infrastructure construction, which depends on our active transport investment and financing policy. How to widen our capital sources in the phrase of transport is a vital task after China entering WTO. In this article we retrospect our government commitments to WTO and analyze the effects on investment and financing policy, then discuss the trends of investment and financing policy in the phrase of transport.

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ITS/TICS Central Data Registry Standard and Its Aplication
in the Construction of Common Traffic Information Platform

WANG Xiao-jing,ZHANG Ke,ZHANG Jian-tong

2002, 2(4): 5-10 .

Abstract ( )

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How to realize the sharing and exchanging of information from different institutes and different regions becomes an important problem during the construction of common traffic information platform in China. In order to satisfy ITS developers’ requirements on data management mechanisms and criterions. ISO/DIS 14817: Transport information and control
Systems-Requirements for an ITS/TICS central data registry and ITS/TICS data dictionaries is proposed. The main purpose of ISO 14817 is to provide a data management mechanism to enhance the ability of sharing traffic data among ITS/TICS institutes as well as applications.
In this paper, the requirements of China’s current construction of common traffic information platform towards central data registry are analyzed, the main ideas and contents of ISO 14817 are introduced, some application cases of central data registry in related foreign systems are presented, and the works that should be developed urgently in relative areas are put forward.

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System Framework and Integration of ITS
Common Information Platforms

GUAN Ji-zhen

2002, 2(4): 11-16 .

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On the base of the public information platform of Intelligent Transportation System (ITS)，this article analyses input-output system of the information in the public information platform of ITS. It also provides the system structure of the public information platform of ITS, and discusses the model how to integrate the public information platform of ITS in technical way.

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The Analysis of Application SS7 to Telecommunication
Network Operation and Maintenance

PENG Jin-yun

2002, 2(4): 17-20 .

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The paper introduces the structure and important effects of SS7 (Signaling System Number 7), and its linking layer and supervising methods are described. That supervising methods of SS7 will be important means of network operation and maintenance is putted forward. The paper prospects the benefits and business chance of SS7 supervising system to operating provider.

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Impact Analysis of Advanced Traffic
Information System on Travel Choice

LIN Zhen, YANG Hao

2002, 2(4): 21-24 .

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Firstly, this paper analyzes travel choice and the basic theory of commute psychology and travel action. Secondly, some problems can be found while analyzing commuters’ commute psychology, such as information oversaturation, commuter overreaction and concentration, which are discussed in detail. Finally, this paper considers that three issues should be paid more attention to in developing traffic information system.

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An Application of MapX in Beijing Public Transportation
Real-time Vehicle Location & Monitoring System

HUANG Ji-min,LI Yue-peng,FAN Yao-zu

2002, 2(4): 25-28 .

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It’s an important part in current ITS research that how to optimize transportation by the integration of GPS and GIS. The basic principle to develop real-time vehicle location and monitoring system with MapX controller are introduced in this paper, and in this way, Beijing Pulic Transportation Corporation’s vohicle control system has been well developed.

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A Theoretical Approach to Optimizing Offsets of
Coordinated Traffic Signal Controls

YU Lei, Katsuhisa Ohno

2002, 2(4): 29-39 .

Abstract ( )

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Traffic signals on urban arterials and in grid networks operate in coordinated systems to provide for smooth progression of major traffic movements. In the past decades, continued efforts have been made to the research and development of coordinated traffic signal control strategies. The models and systems that have been developed include both the off-line models such as TRANSYT and PASSER, and on-line systems such as SCOOT, SCATS, UTCS, and the latest RT-TRACS, which is a framework still under development. Despite the availability of so many models and systems, all of them have been designed by using heuristic algorithms to optimize the signal offset. On the other hand, most of existing theoretical methodologies for optimizing the signal offset are deterministic in nature, which ignore the stochastic variations o# vehicles. The lack of a sophisticated theoretical basis in the state-of-the-art for optimizing the signal offset has significantly limited the researcher’s ability to evaluating existing models and systems in an objective manner. This paper presents a stochastic process- based approach for determining the optimal offset of two adjacent traffic signals for one directional traffic flow, which minimizes the average total delay and/or average total number of stops. By using the probability theory and queuing theory, the proposed approach incorporates both platoon dispersions and the stochastic variations of the queue at the intersection. A computational algorithm for determining the optimal offset is presented. With a possible expansion of the proposed algorithm to more complicated scenarios, it has a high potential to be incorporated into existing models or systems for both evaluation and implementation purposes.

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Researchingon Time Petri Net Applied in
Integrated Positioning System

ZHAO Jing, MIN Xue-feng

2002, 2(4): 40-44 .

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Integrated Positioning System is an important part of Intelligent traffic system, The electrical technique, signal processing method, filtering and data fusion are applied in it to get continous and reliable positioning data. The system need collects many sensors data, so we design Time-Petri net with feed back to get accurate singal sequence and monitoring the possible soft-error on real time. It has great contribution to the reliability of software.

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Quantitative Methods of Traffic Congestion Analysis

DA Qing-dong, ZHANG Guo-wu

2002, 2(4): 45-48 .

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This paper introduces several methods to depict the relationship between flow and occupancy, as the indicator of traffic status changing with time during one-day, and presents their correlation with microwave detection data. It points out that during rush hour or congestion hour, the correlation of flow-occupancy is different from other periods significantly. Moreover, by the definition of traffic congestion hour or period, different from traffic rush hour, the capability of identifying traffic status increases.

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An Application of TOWS Method in the Adaptability
Analysis and Strategy Planning of Highway Transportation

ZHOU Wei, MA Shu-hong2

2002, 2(4): 49-53 .

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On the basis of the similarity between the developing environment of highway transportation and enterprises, this paper considers the system of social economics as the outside environments of highway transportation, analyses the adaptability of highway transportation and economics by using the TOWS method, and proposes the developing strategy of highway transportation.

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Freeway Incident Detection Using Improved
OLS Algorithm and RBF Neural Networks

YANG Yao-hua, LI Xin, JIANG Fang-ze

2002, 2(4): 54-58 .

Abstract ( )

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This paper presents a new hybrid intelligence algorithm for automatically detecting ft-way incidents, which employs fuzzy clustering and RBF neural computing technique. An improved OLS (Orthogonal Least Squares) selection algorithm for training RBF neural networks is also proposed. The simulation results illustrate that the improved OLS selection algorithm accelerates the training of the RBF neural networks substantially and it need not to decide the number of RBF centers in advance. The satisfactory performance can be achieved by using this algorithm in freeway incidents detection.

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Application and Reflection to Management
Information System of Railway Freight Cars

LI Qing-fa

2002, 2(4): 59-62 .

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The paper first analyses the requirements and the characteristics of railway freight cars management in marshalling stations, and studies the existing problems and possible improvements on information sharing and integration among the management of freight car system by considering of the progress of computer technology. Based on the practical application of YIS at Xianfangbei marshalling station, it advances the ways to enhance the efficiency of information usage, optimize the statistical analysis and normalize the processing foe traffic accidents. An operational scheme has also been put forward aiming to higher performance and better transport service for marshalling operations.

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Discussion on the Clean Transportation

SHEN Jin-sheng, LIU Zhi-shuo

2002, 2(4): 63-67 .

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With the increasing of traffic scale, the traffic environment is getting worse. In order to deal with this problem, the paper puts forward a new traffic pattern, "Cleaner Traffic". to build and operate the traffic system. The paper sets forth the conception, contest and the operation system of the Clean Traffic, builds the corresponding assessment system, and finnally gives the examples of the clean traffic planning and the Alternative Fuel Vehicle to illustrate the development of the Clean Vehicle.

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The Construction and Development of
The Center of National Railway Intelligent
Transportation System Engineering and Technology

NIE A-xi, JIA Li-min, SHI Tian-yun, SHEN Hai-yan

2002, 2(4): 68-76 .

Abstract ( )

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The Article introduces the importance, main task and key technology of“Railway Intelligent Transportation System (RITS)”. It discusses the developing goal, main task, organization structure, management mode, resource superiority, investment, research trends and core task of "the Center of National Railway Intelligent Transportation System Engineering and Technology (RITSC)". They reflect the construction and development of RITSC comprehensively.

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