Journal of Transportation Systems Engineering and Information Technology

Progress and Discussions on Transportation Development of China

WANG qing-yun

2007, 7(1): 1-11 .

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This paper reviews the historical shaping process and the research results of the transportation system of China and analyzes the special demands of the transportation systems in different periods and their intrinsic causations. It studies the overall layout and operation of the comprehensive transportation system of China. The paper then discusses the significance of the research based on some of the recent key programs the author laid and organized to meet the demand of the country’s transportation development, and demonstrates the practical application of some major findings. It further analyzes the problems of the transportation systems of all periods and brings forth the policies and suggestions on the improvement of designing, constructing and operating the overall transportation system.

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Traffic and transportation system engineer of china system engineer committee 20 years anniversary

ZHANG Guo-wu

2007, 7(1): 12-17 .

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Set up in 1986, traffic and transportation system engineer is a comprehensive academic organization of china system engineer committee. It is also a non-government academic organization organized by experts with high levels, specifying in engineer, management, science, teaching, and enterprises. The aim of the 20-year anniversary is to summarize the development history of the committee, exchange experience in city transportation, high-tech transportation, traffic building and plan. Meanwhile, target of 2007 is also proposed. There are three topic of the committee: traffic transportation system and theory innovation, traffic transportation system and scientific innovation, traffic transportation system and enterprise innovation. Heated discussion is conducted by attending experts.

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Study of Key Technologies and Applications of Floating Car Traffic Information Collection and Processing

QIN Ling, ZHANG Jian-fei, GUO Peng, QI Tong-yan

2007, 7(1): 39-42 .

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In order to promote in-depth research, communication and practical applications of floating car traffic information collection and processing technologies, this paper summarizes current research and application status, describes the key process and technologies developed by the National Research Center of ITS Engineering and Technologies, including the floating car map matching algorithm and the travel time estimation algorithm. In the end, this paper discusses potential applications in traffic management and information services.

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Urban Traffic Situation Evaluation Methods Based on Probe Vehicle Data

Zhang Wei, Xu Jian-min, Wang Hai-feng

2007, 7(1): 43-49 .

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Urban traffic situation information is the basis of effective traffic guidance and traffic control. It is usually expressed by average speed and average travel time of the vehicles on the road. Based on the error analysis of the algorithms based on average speed and average travel time, this paper promoted the urban traffic situation evaluation methods based on probe vehicle data. And experiments based on probe vehicle data provided by the taxi management system of Guangzhou, combined with vehicle license recognition and practical timing. The results proved that the method is quite effective and practical.

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Urban expressway control based on fuzzy logic and variable speed limit

LIN Shang-wei,LIN Yan

2007, 7(1): 50-56 .

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This paper discusses the pressing need for the traffic contro1 of urban freeway. Incorporating the characteristics of urban expressway with a macroscopic dynamic deterministic traffic flow model, a variable speed limit control (VSLC) approach is proposed. The main idea is that we use a VSLC for middle-low traffic density section, and a VSLC, together with an on-ramp control, for middle-high traffic density section based on the principle of fuzzy logic. The VSL controller is used to regulate the velocity of vehicles and therefore, to make the traffic flow more stable, while the on-ramp controller is only used in middle-high traffic density section to maintain the density of the traffic flow on the mainline. The simulation results are also given to show the effectiveness of the proposed approach.

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Dynamic Route Guidance Algorithm for Driver Based on
Transiently Chaotic Neural Network

Ma Yan-li, Pei Yu-long

2007, 7(1): 57-60 .

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Dynamic Route Guidance System guides the behaviors of drivers by providing optimal route based on real-time traffic information. To guarantee the total expenses that travels on the network is least, and the driving route provides for driver more reasonable and more efficient. Dynamic route guidance must be ensure global optimal. This paper use transiently chaotic neural network (TCNN) to solve the problem of dynamic route guidance. By importing chaotic dynamic characteristic in HNN, using its all-over characteristic to search randomly, using the annealing algorithm to control and weaken the chaos, and then turning to HNN to be optimized, we can make sure the net convergence to a balanced steady point. Result of simulations shows that TCNN algorithm is used in Dynamic Route Guidance System to solve the optimal route problem, can always converges to the globally optimal solution and has higher capability for searching than HNN. It provides an effective way to figure out continuous nonlinear optimizations, and efficiency of TCNN algorithm used in Dynamic Route Guidance System is proved.

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Modeling and Implementation of an Integrated Ramp
Metering-Diamond Interchange Control System

TIAN Zongzhong

2007, 7(1): 61-72 .

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This paper addresses a modeling approach to analyzing an integrated system that includes freeway mainlines, ramp
metering, and an upstream signalized diamond interchange. The modeling approach takes into consideration of the various
components, their operational characteristics, and their interactions within the system. Strategies are also proposed for real-time
operation and possible field implementation. The key element of achieving an integrated operation is to control the ramp feeding
traffic through special signal timings at the diamond interchange. Whenever a long queue is detected at the metered ramp, the signal
timing should be adjusted to reduce the traffic flows entering the ramp. In this way, the ramp meter will remain in operation for as
long as possible, which would delay the onset of queue flush (i.e., termination of ramp meter) and minimize the possibilities of a
freeway breakdown. Because a diamond interchange is usually controlled by special signal phasing and timing, the control strategies
are specially focused on the special diamond signal phasing schemes. The system design and system architecture are also presented
for potential deployment of the system in the field.

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Optimal Model for Passenger Transport Pricing under Market Competition

Si Bing-feng, Gao Zi-you

2007, 7(1): 73-78 .

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In this paper, the stochastic user equilibrium models are proposed for assignment problem in inter-city passenger transport network based on discrete choice theory, in which the different transport prices are regarded as perturbation parameters. Furthermore, a tri-level programming is presented in order to seek the optimal passenger transport price while the benefits of passengers and transport departments are both considered under the condition of market competition between different transport modes. A heuristic algorithm for the tri-level programming problem is also proposed.

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Design and Development of a Statewide Land Use Transport Model for Alberta

ZHONG Ming, John Douglas Hunt,John Edward Abraham

2007, 7(1): 79-91 .

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The fast growing of economy in Alberta, Canada makes a well-ahead statewide planning a pressing task. A statewide land use transport model is being developed at the University of Calgary for responding such a need. The model is based on the framework of PECAS, which represents Production, Exchange, Commodity Allocation System. The virtue of such a system is that it brings the transportation planning in the context of the whole economy by considering the fundamental root of transport demand, which is the exchange of goods, services, and labor among various activities, such as industries, services, households, and government. The PECAS framework is a spatial economic simulation system with a focus on transportation planning and land development planning, which has recently been developed and applied in a number of states and metropolitan regions in the United States. It draws from previous modeling experience, especially MEPLAN and TRANUS, and provides significant improvements in theoretical basis and behavior representation. This paper describes the design and development of such a model for the Canadian province of Alberta in terms of its data sources, novelty, and strategies for further calibration.

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Microscopic traffic-emission simulation and case study
for evaluation of traffic control strategies

Kun Chen, Lei Yu.

2007, 7(1): 93-100 .

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Many studies have shown that the amounts of vehicle emissions are typically affected by vehicles’ instantaneous speeds and acceleration rates. In order to make an effort to control the mobile source vehicle emissions from a technical perspective, it is necessary to develop a microscopic simulation platform for estimating vehicle emissions, which can capture the instantaneous vehicles’ modal activities. This paper is intended to develop an integrated microscopic traffic-emissions simulation platform by using the microscopic traffic simulation model VISSIM and the modal emissions model CMEM. A sub-network selected from the Haidian district of Beijing is used to build a traffic simulation network, whose traffic and emission conditions are subsequently evaluated. Relationships between the instantaneous emission / fuel consumption rate and the instantaneous speed/acceleration are first analyzed. Then, the emissions for a variety of vehicle types in the network are analyzed. Finally, the developed platform is used to evaluate the impact of alternative traffic control and management strategies for two scenarios.

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Genetic Algorithm for Continuous Network Design Problem

ZHANG Guo-qiang, LU Jian

2007, 7(1): 101-105 .

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Network Design Problems have come from the planning of road network and study on Algorithm for Network Design Problem is of great practical importance for the engineering practice of transportation planning. The Paper has summarized Network Design Problems and has pointed out the complexity and importance of study on Algorithm for Network Design Problem. With Continuous Network Design Problem as the main study subject, it analyzed the structural characteristics of mathematical model of the bilevel programming for Continuous Network Design Problem. Based upon modern genetic algorithm, a new algorithm has been designed particularly for the solution of Continuous Network Design Problem. With a concrete Continuous Network Design Problem as an example, it has been testified that not only the algorithm has very good characteristics of convergence but that the best solution of the algorithm is credible. Idea and approach of the paper can also be applied to other types of Continuous Network Design Problem.

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A research on waiting delay characters of mixed traffic flow composed of two representative types of vehicles at an unsignalized intersection

SHEN Jia-jun, WANG Wei, CHEN Jun

2007, 7(1): 106-109 .

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In order to depict waiting delay characters of mixed traffic flow at an unsignalized intersection, this paper sets up the waiting delay formula of mixed traffic flow composed of two representative types of vehicles. On the ground of analysis on some flaws of recent studies on unsignalized intersection, the paper bases on the gap acceptance theory, sets up the waiting delay formula of mixed traffic flow composed of two representative types of vehicles at an unsignalized intersection, then analyzes the relation between the waiting delay of the minor flow and the volume of the main flow, the proportion of various kinds of vehicles of the minor flow by selecting appropriate data of parameters of the formula.The result shows that the formula accords with the actual traffic flow condition at an unsignalized intersection.

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Study on Microscopic Simulation Model of Right-Turn Vehicles at Signalized Intersection

JIANG Hai-feng,WEI Xue-ye, ZHANG Yi

2007, 7(1): 110-114 .

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Mixed traffic is the main characteristic of large cities in China, especially at signalized intersection. Great interference occurs between vehicles and bicycles at the same phase but heading for different directions, which severely reduce the traffic capacity of the intersection, deteriorate the hidden trouble on traffic safety and make the traffic management very hard to be implemented. Microscopic traffic behavior model is one of the powerful tools for studying mixed traffic; Based on the mixed traffic problem at three phase signalized intersection, this paper analyzed the main factors affecting the traversing behavior of right-turn vehicles, and established a microscopic behavior simulation model of right-turn vehicles traversing through bicycles. The model is calibrated and validated with field data. This model illustrates the interference mechanism between vehicles and bicycles at signalized intersection and provides a flexible and efficient experiment method for the microscopic simulation of vehicles under mixed traffic conditions.

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A New Traffic Assignment Model
Based on Efficient Paths and Game Theory

HE Sheng-xue,FAN Bing-quan

2007, 7(1): 115-119 .

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Traffic assignment is a key part of transportation planning, and the determination of efficient paths in the transportation network is the important basis of traffic assignment. Combining the orientation of searching the route and the decisive position of links and nodes, a multilevel orientated algorithm of searching efficient paths is proposed. Based on the new algorithm of searching efficient paths and game theory, a new traffic assignment model is presented. The new algorithm simulates the actual route-choose behavior and finds the unique route flow pattern. In the end a simple numerical example is given to show the new model’s efficiency.

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An Order and Selling Inventory Model with Shortage Allowed

ZHOU Wei-qi, XUE Nian-wen,LI Zhong-xing,

2007, 7(1): 120-123 .

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An order and selling inventory model is concerned based on the inventory theory. Considering that lot-size discount phenomenon usually exists in the actuality, so suppose to have lot-size discount in the model. And also suppose that the need speed is continuous and uniform, and shortage is allowed, which brings shortage cost. The mean total inventory cost includes order cost, inventory cost and shortage cost. An order and selling inventory model with shortage allowed under the condition of limited-space warehouse and lot-size discount is developed approaching to actuality as possible. And make use of mathematics method to solve the model, then the optimal order quantity, the optimal order cycle and the minimum mean total inventory cost are confirmed. Finally, the application of the model is illustrated by an example.

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Comparative Study on Optimal Type Selection of Marshalling Station Between Unidirectional and Bidirectional

YAN He-xiang,LIN Bo-liang,ZHENG Jin-rong,ZHANG Yun-he

2007, 7(1): 124-131 .

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Marshalling station is a fundamental place for railway technical operation，and plays a key role in wagon flow organization．Since the cost of construction or reconstruction of Marshalling station is very huge，there should have careful consideration in station type selection．Marshalling station，whatever it is unidirectional or bidirectional，has its own advantages and disadvantages in real operation，and at the same time，there have many other factors which influence station layout．Therefore，it’s unpractical to determine station type only by qualitative analysis，instead，quantitative analysis must be adopted so as to establish a general standard．Basing on above analysis，This paper first puts forward technical items in type selection，and then makes quantitative research into influence of reversing train in unidirectional Marshalling station and angular traffic flow in bidirectional Marshalling station respectively，from which some relative technique factors are acquired in the aspect of wagon flow structure．Afterwards，this paper presents typical station type selecting model by taking unidirectional three-stage/three-yard Marshalling station and bidirectional three-stage/six-yard Marshalling station as representation．At last，northern Xuzhou is applied to a numeral example to validate the effect of this method，which proves that station type selecting by means of comparing the total waste of wagon flow in the Marshalling station from the view of wagon flow structure is not only effective but scientific，meanwhile，this provides a scientific and effective decision-making measure for determining the scope and layout of Marshalling station．

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The current logistic situation and future trend in greater Tokyo

LI Qian-xi, Shinichi OKAMOTO,WANG Yao-qiu, MU Dong

2007, 7(1): 132-136 .

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The logistic situations in the big city, the prosperity and the future developmental conditions of that city are closely related. Based on the carefully investigation of the logistic situation in greater Tokyo, Japan. This article provides the clear analyzation of such from many different angels, such as the development trend, the logistics quantity, the logistics facilities and the logistics policy etc.

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The Application of Cluster Analysis Approach to Family's Type Division

YAN Jie

2007, 7(1): 137-142 .

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In the process of the producing amount of residents’ family outgoing, by family type analysis the paper adopts the cluster analysis approach, K-cluster’s method of mean value , with the aid of the statistics software,to determine and divide the family outgoing types with different similarity standards, thus realizing the practical operation of the family’s types. The analysis approach and the mathematical calculations improve the effectiveness of operation.

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Analysis of Major Road Accidents in Yunnan Province

LIU Dongbo, WANG Changjun

2007, 7(1): 143-148 .

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This paper gives an analysis on the distribution and features of the major road accidents for the last ten years in Yunnan province, as well as the relationships with highways, motor vehicles, drivers and economical development. After that, the emphasis moves to the 42 serious accidents occurred in 2006 in the province. The characteristics and causes of the accidents are put forward to .

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