Dynamic traffic flow map is one of the focuses of recent researches on ITS, but it is limited by the locations and numbers of traffic detectors. This paper presents a method for traffic flow map using the data received from the GPS mobile terminals equipped vehicles. Firstly, a vehicle real-time monitoring GPS system is given. Secondly, a map-matching method was proposed, which eliminated ineffective data by observing the vehicles status and calculated link time cost of each probe vehicle and the average speed. The equation of speed-flow relationship established by observing traffic data, especially the general one established in conditions of any traffic roads under any traffic burden conditions. Thirdly, it developed a dynamic traffic flow map arithmetic based on the results above and successfully solved the questions: data collecting, traffic barrier-free conditions processing and traffic flow map calculating. Finally, the results of simulation experiment indicate that the methods are effective and practical. It can be used as a new real time network method to control the traffic signal, which is different from the traffic signal controlled method that depends on the timer or road linear controller method.


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    Title :

    Application of dynamic traffic flow map by using real time GPS data equipped vehicles


    Contributors:
    Shi, Xiaohui (author) / Xing, Jianping (author) / Zhang, Jun (author) / Zhou, Lei (author) / Li, Weiye (author)


    Publication date :

    2007


    Size :

    4 Seiten, 10 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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