Journal of Transportation Systems Engineering and Information Technology

System Engineering and Urban Traffic

ZHANG Guo-wu

2007, 7(2): 1-7 .

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With the continuous development of urban economy and acceleration of motorization process, the problems of urban traffic are more and more serious. The topic of 5th Council Conference of “Traffic and Transportation Forum 7+1” is urban traffic. Beijing and Shenzhen cited as examples, it mainly discussed the policy of public traffic priority and strategies of solving urban traffic problems, then made proposals combined with systems engineering theories and methods.

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Viewpoint about Specialized Passenger Railway

GUANG Xiao-ping,MA Chang-xi

2007, 7(2): 8-11 .

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The necessity and feasibility of constructing the railways specialized for passenger trains to separate passenger and freight transportation in China is discussed at length in this paper.
From the view of railway network construction planning, the developing strategies on constructing specialized passenger railway are discussed to build a harmonious society, and the new design idea and operation management mode of the specialized passenger railways are brought forward, including setting up future –oriented railway design conception, adopting “small company with big consultant group” construction and management mode, investment and financing by multiple sources, developing key-technology research, increasing creative ability, exploring new management mode, and improving service quality etc.

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The Development Tendency and its Reasons of Foreign City’s Large Passenger Transportation Hub

HUANG Zhi-gang RONG Chao-he

2007, 7(2): 12-17 .

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On the basis of analysis of the development of the urban passenger transportation hub, the paper points out the large passenger transportation hub in developed cities tends to be enormous, integrated and tridimensional in recent years and analyses the intrinsic reason in details. It is the inevitable request for the large passenger transportation hub to make the passengers’ travel more convenient and realize its economies of transportation network as well when the transportation network have developed in the special phase and the restraint of the transportation resources is increasingly serious. Finally, the paper emphasizes that the transportation planning acts an important role in the forming of the large passenger transportation hub.

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Research on Port Informatization Develop Strategy

Huang Yong, Huang lei, Mao Bao-hua

2007, 7(2): 18-24 .

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This article used the SWOT to carry on the analysis to the strategic environment of the port informatization. It pointed out if you want to win in the intense market, constructing informatization is the inevitable choice. This article has constructed the port informatization strategic target and the strategic frame, divided the port informatization strategy into 4 levels and 13 systems. It elaborated the strategy implementation method and the principle of port informatization. Then it took the Xinsha port in south-China as the case to show its serviceability and validity, and had the importance significant to the port informatization construction, also impelled the enterprise to obtain the comparison superiority in the market competition.

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Study on Cooperative Optimization of UTCS with UTFGS

CHEN Xin, YANG Zhao-sheng,WANG Hai-yang,TANG Yang-shan

2007, 7(2): 25-31 .

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Cooperative optimization of UTCS with UTFGS is studied based on subsystem function independence, integration and mutuality. An optimal model based on hierarchical cooperative optimization is established. In the process of solving the model, one guidance cycle consists two close control cycles, using the second control cycle parameters to calculate the next guidance cycle parameters, this calculating method can ensure UTCS and UTFGS follow the real-time traffic flow dynamically. It also ensures UTFGS strategy continuity and dynamic cooperation of UTCS with UTFGS. The simulation result proved that the model in this paper is practical and the algorithm is feasible. The study provides theory and method guide for real cooperation of UTCS with UTFGS application system development.

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AN SUPPORT VECTOR MACHINE-BASED APPROACH TO DATA-LAYER MULTI-SOURCE ITS DATA FUSION

ZHAO Na-le, YU Lei, GENG Yan-bin, CHEN Xu-mei

2007, 7(2): 32-338 .

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Through a characteristics analysis of multi-sources ITS data fusion on data layer and support vector machine, this paper proposes a multi-sources ITS data fusion approach using support vector machine on the basis of theory of support vector machine (SVM), and designs implementation processes of this approach from support vector machine training, training result evaluation, and support vector machine test. The comparison of data for before and after support vector machine fusion, when applying to two-source traffic flow data from BanShen highway ShangJie on-ramp in Japan, demonstrates that the proposed fusion approach can process the data quality control effectively, which improves the level of the data accuracy.

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Map Matching Algorithm of Large Scale Probe Vehicle Data

Zhang Wei, Xu Jian-min, Lin Mian-feng

2007, 7(2): 39-45 .

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Map matching is the key problem of probe vehicle technology. For the characteristics of probe vehicle data, traditional navigation map matching can not serve the requirements of probe vehicle data. Based on the common and different points between the map matching of traditional navigation and probe vehicle, this paper advanced the solution of probe vehicle map matching modes and corresponding road network structure. The map matching algorithm system was promoted, including road first map matching mode, parallel reverse road map matching mode, node map matching mode and delay map matching mode, and verified and evaluated the algorithm. The map matching algorithm promoted in the paper has been applied in the ITS demonstration project of Guangzhou, and the practice proved that it is quite effective and practical.

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Performance of GPRS Data Link for Automatic Vehicle Location System

Liu Xu, Yang Dong-kai, Zhang Qi-shan

2007, 7(2): 46-51 .

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The Data Link of Automatic Vehicle Location System (AVLS) based on GPRS is introduced. The key technology of accomplishing link is described according to the working flow of GPRS users. The GPRS based AVLS system model is given from both the voice and the data transmission. The relationship between the access delay and the voice traffic, data length, data transmission interval, system volume is analyzed through the simulation. It is concluded from the simulation result that, for the AVLS with small voice traffic, short data length, GPRS can be used for the large-scale volume.

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Study of Video Transport in Distributing Monitor System of Freeway

AN Ming-wei,CHEN Qi-mei,GUO Zong-liang

2007, 7(2): 52-57 .

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Distributing monitor system of freeway is positive extensive applied,and video picture of the high quality is needing and put forward request to QoS in many ways. Based on the analysis of the difficult of real-time video transmission, delay、jitter and loss ,which have disadvantage on digital video transmission, are discussed in this paper. Aim at transmission disposal of digital video , the optimal technique project of the system is taken ,and the realization model of real-time video transmission in network is presented. With the model, reasonable method on video encode, protocols transmission and procedure realization are proposed and an integrated platform of Real-time video transmission system is built. The system of real-time video transmission can combine the Ethernet, the net of supervision picture and the net of monitor data, and can complete digital video transfer ,so , the net management and picture share can be realized.

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Transit Route Adjustment and Effect Analysis System Design

MA Ji-hui, GUAN Wei, HE Shu-yan, CHEN Peng

2007, 7(2): 58-62 .

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Transit Route Adjustment and Effect Analysis System is indispensable for reasonable urban transit network planning, transit route adjustment and urban public transportation development. Transit route adjustment analysis is a complex optimal procedure which combines quantitative and qualitative methods, empirical and theoretical methods and creative and feedback processes. In this view, based on four-stage traffic model theory, using O-D estimation method and stochastic user equilibrium assignment model, with the purpose of achieving a realistic and reasonable result, this paper designed transit route adjustment and effect analysis procedure. Based on an 8-layer system architecture, the system is constructed under TransCAD platform. The system is proved to be valuable in application since the simulation results which based on a sample system integrating real transit network of a city are reasonable.

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Innovative Lightweight Transit Technologies for Sustainable Transportation

SHAO L.K.

2007, 7(2): 63-71 .

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In recent years, there is a phenomenon in many major cities that building more roads to relieve traffic congestion achieves nothing more than encouraging more vehicles to use them resulting in more congestion which is one of the prime sources of bad air quality and inefficient use of energy. Facing with these problems, a number of major cities are either building or planning to build mass transit railways as a backbone, supplemented by light rails and other transit modes to enhance mobility and network connectivity.

This paper reviews a number of emerging and innovative lightweight transit systems, from an urban mobility and sustainable development perspective. The objective of the paper is to serve as a reference to practitioners who are involved in the planning and design of sustainable transportation systems.

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Beijing Road Network Travel Rate Time Reliability Evaluation

Li Xian, Wen Huimin, Gao Yong, Chen Kun

2007, 7(2): 72-76 .

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With the booming of urbanization and motorization, the transportation system is becoming more and more unreliable due to the weak balance between supply and demand. Transportation network reliability study is developing very fast around the world which is a new technology to evaluate the stability of the transportation network, especially when disturbance or incident occurring. Thus, it is necessary and important to study the road network reliability to support planning and operation in Beijing. Taxi is one main component of traffic flow. The smart card, IC card which is installed in taxi can record the travel time and distance per trip. Using the smart card recorded data, the travel rate time per trip can be calculated, and the regulation of travel rate time by taxi can be fond from the cumulative taxi datum. In this paper, three new reliability indices and methodologies about travel rate time are developed, and Beijing transportation network reliability is analyzed by using these indices and the taxi trip datum.

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Airline Safety System Risk Assessment based on Evidence Theory

Ding Songbin, Shi Rong, Shi Heping

2007, 7(2): 77-82 .

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For solving the problem of uncertainty in airline safety system risk assessment,it brings evidence theory to the assessment.In the paper,the indicator system of airline safety system risk assessment is established. An arithmetic and a model base on evidence theory are also advanced.At last an example shows that the method is reasonable and efficient to the problem of uncertainty in airline safety system risk assessment.

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Research on the way to determine type and scale of bus stops

Shi Hong-wen, Luo Liang-xin, Bao Tong-zhen

2007, 7(2): 83-87 .

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Bus stop is a kind of primary facility in bus operation, it is very important for providing possibility of passengers’ alighting and boarding. In initial stage of land-use & bus developing, simple design of stops is enough for buses’ dwelling and passengers’ boarding & alighting. But as land-use & bus system developing, simple design can’t meet the need of buses and passengers in some lines concentrated and passengers crowded bus stops. In those stops buses’ dwelling time increases, level of bus service descends. it is very necessary to research more about type and scale of stops to ensure the harmonization between capacity and need. After discussing types classification & applicability, stop capacity calculating, and bus operational characteristics, a method to determine type and scale of stop is given here. By the method, the type and scale of stops can be determined when buses and passengers amount is given. After all these, some examples are shown for implemental suggestions.

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A Mutating Evolution Algorithm for Locomotive Diagram with Double Shoulders-Circuit Locomotive Routing by the Mode that Unfixed Traction

He Feng-dao,He Dong-yun

2007, 7(2): 88-92 .

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A mathematical model for double shoulders-circuit locomotive routing by the mode that unfixed traction was presented, the objective is to minimize the total time for locomotives staying in districts, and the optimized schedule was obtained with a mutating evolution algorithm. The algorithm carries on the varying degree mutate according to the fitness of the individual, and uses the heuristic mutation and the stochastic mutation can make the eminent schemas heredity to the filial generation which from the chromosome of the excellent individuals, maintains the filial generation’s multiplicity. Thereby the algorithm can enhance the optimized capability and the convergence rate. The proposed method was tested over an actual problem of train diagram. The results show that the total time of locomotives staying in districts and the required number of locomotives are reduced by about 23.8% and 9.8%， respectively, and compared with the genetic algorithm.

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The Vendor Managed Inventory Model under Supply Chain Management

Gao Hai-jing, Gao Zi-you, Sun Hui-jun

2007, 7(2): 93-97 .

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Inventory is a necessary process that can ensure the reasonable function of the supply chain, and the control on inventory management under the supply chain management is an important content of the supply chain management. Vendor Managed Inventory is a comparatively common method, which can effectively avoid magnifying demand, reduce the total cost of the supply chain, and enhance the efficiency of the supply chain. In this paper, after the analysis of the buyer’s, the seller’s profit function and that of the supply chain in a two-echelon supply chain with single manufacturer and one retailer was considered, a inventory controls model was establish, in which the profit of the supply chain is maximal. Then a model with invariable demand and a model with function demand under vendor managed inventory mode were established respectively, and the iterative method was used to solve the later case. In the paper, the price mechanism of regulating the retailer’s purchase price was taken to equipoise the both parties’ profit in the supply chain.

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The Analysis of Compressed force in Crowds

LU Chun-xia

2007, 7(2): 98-103 .

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The movement and force of crowds are analyzed from the micro-model at high density. The compression and deformation among crowds are emphasized, which is different from the classic models. The elastically deformation and the movement are close correlated. It is elastically deformation that results in the force spreading and accumulating through the crowds, which is the important cause of the disaster. The failure of crowd simulation at high density lies in its loss of force speading.

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Choice and Research on the Signal Operating Modes Based on the Intersections Which Use the All-in-one Design for the Nonmotorised Transport

ZHANG Jiu-yue, ZHANG Shun-ying

2007, 7(2): 104-108 .

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The way in which the traffic signal operates has directly affected the capacity, the crossing delay and other aspects of the urban road intersections. In view of the setting of twice crossing in the intersections which use the all-in-one design for the nonmotorised transport, this paper analyzes the influence of the signal operating modes on mobile, bicycle and pedestrian crossing. By the research of the signal operating modes on transportation management , signal cycle length, vehicle delay, pedestrian delay and so on, together with the qualitative and quantitative analysis based on the intersection geometric characteristics and the traffic flow , we propose an improved intersection signal operating mode , which has more advantages at making full use of the intersection layout , reducing the crossing delay of the nonmotorised transport, and then provide the more rational proposal for the transportation manager and policy-maker .

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Regional Public Transportation Timetabling Model with Synchronization

LIU Zhi-gang,SHEN Jin-sheng,WANG Hai-xing, YANG Wei

2007, 7(2): 109-113 .

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It plays an important role in regional public traffic scheduling that creating the timetable which can minimize the transfer time of the passengers in every connection stop; meanwhile, synchronization departure can deal with the problem effectively. In this paper, the regional public transportation timetabling is formulated as a peculiar kind of non-capacity Knapsack Problem (KP) with the synchronization coefficient that is defined by author. The mathematical model is built, and the Nesting Taboo Search Algorithm is developed to solve the problem. The computational results demonstrate that the high quality solutions to the KP can be obtained by using the modified taboo search algorithm，and that the algorithm is efficient and feasible.

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Research on the Signal Coordination Methodology in a
Traffic Signal Control System with Transit Priority

Liu Hong-hong,Yang Zhao-sheng

2007, 7(2): 114-118 .

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Network real-time traffic signal control problems can be decomposed into a series of sub-problems of manageable complexity and size using either hierarchical or fully distributed approaches. In the hierarchical approach, the network optimization problem is transformed into a multi-level control problem with distinct optimization objectives at each level. In the distributed approach, the network control problem is broken into a series of smaller problems that can be solved in parallel by independent processors. This paper presents system architecture for distributed real-time network signal control system with transit priority and signal optimization process, and describes the methodology for determining the most appropriate time for implementing signal switching decisions that explicitly considers upstream and downstream coordination impacts，vehicle queuing, transit activities.

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Appraisal model of propaganda effect of traffic safety based on fuzzy evaluation

Zhang Yu,Luo Jun-yi,Wang Chang-jun, Wang Yuan-hai

2007, 7(2): 119-123 .

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Based on the fundamental principles of fuzzy evaluation, this paper presents a appraisal model of propaganda effect aiming at processing data collected in the process of propaganda effect assessment.According to experts’ analysis we select an appropriate function of grade of membership and corresponding parameters.Meanwhile according to different grades of popular rate before propaganda,we establish corresponding assessment grades,and then produce an evaluation result through synthesizing the data collected after propaganda to make the whole propaganda process in the closed loop control.Integrated by weights calculation and analytical hierarchical process(AHP),this model produces an “excellent” grade of propaganda effect of traffic safety of certain propaganda examples. And the result of the examples indicates that the data processing model is an effective method in assessing propaganda effect of traffic safety.

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Application of Median U-turn in Traffic Organization

Liu Shu-peng,Ma Jun

2007, 7(2): 124-128 .

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Recently, urban congestion always happens at intersections, of which the primary reason is the imbalance of traffic capacity of intersections and their close-by roads in mainland China. This paper introduces an unconventional design – median U-turn to solve the problem above. It firstly discusses the concept of the median U-turn, its virtues and drawbacks, then focuses on the its applicational feasibility in the urban road system. Finally the paper sets out some issues that should be considered when the method of median U-turn is applied in the planning of traffic net, road design and traffic management.

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Research and Application on the Comprehensive Monitoring and Control Centre System of Qinghai-Tibet Railway Line

Qin Yong, Wang Zhuo, Wang Yan-hui, Jia Li-min

2007, 7(2): 129-134 .

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The comprehensive monitoring and control centre system of Qinghai-Tibet railway line is put forward to be built, in order to guarantee the safety operation for the high-class tableland railway line. This paper expatiates from such aspects as system construction aim, system architecture, system function, software architecture, spatial database and physical structure etc., and the practical application effect and application interface embody the advance character and practicability of this system.

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An empirical study on parking problem in university campus

Shang Hua-Yan, Lin Wen-Ji, Huang Hai-Jun

2007, 7(2): 135-140 .

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In recent years, more and more university staff who originally live in the campus, are moving to other places, and the number of private cars owned by these people is increasing rapidly. In addition, the communication between universities and communities is becoming closer. As a result, the shortages of parking supplies occur frequently in campus. This paper presents a case study carried out in the campus of Beijing University of Aeronautics and Astronautics. The inflow and outflow of vehicles, location of parking lots and corresponding capacity, as well as the drivers’ parking behavior, are surveyed and analyzed. The average parking duration of each vehicle and the turnovers of some parking areas are also computed from the survey data. Suggestions for improving the campus parking systems are given. It is expected that this study can benefit the similar problems existing in other universities.

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Development of Regional ITS Architecture for Jiangsu Province

Zhang Ke,Qi Tong-yan,Liu Hao,Jin Ling,Liu Dong-mei,Lu Yi, Wang Chun-yan, Shen Hong-fei

2007, 7(2): 141-146 .

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Regional ITS Architecture for Jiangsu Province has been accomplished by National ITS Center of Engineering and Technology (ITSC). It is the first time to develop province-level ITS architecture in China (except for municipalities directly under the Central Government). This paper clearly presents the basic concept and development method of regional ITS architecture with Chinese characteristics. Meanwhile, regional ITS user service, logic architecture, physical architecture and application system for Jiangsu Province are introduced in detail.

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