Relieving traffic congestion on roadway has always been one of the prior concerns of traffic engineering. Thoroughly understanding the factors which cause traffic jams plays the fundamental role in planning, design, construction and management of roadway facilities. This paper focuses on experimental observations and theoretical analysis of urban freeway congestion due to complex features of traffic flow, shock wave and state transition. Real time detected data were collected to calculate shock wave speed and establish vehicle trajectory models. A typical urban freeway segment in the center of Shanghai City is used in this analysis. As a result, conclusions have been drawn and the theory of shock wave speed could be used to help establishing traffic control strategies and to control queue length.


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    Title :

    Research on Spatial-Temporal Features of Urban Freeway Congestion


    Contributors:
    Hao, Yuan (author) / Wang, Ying (author) / Sun, Li-jun (author) / Xu, Tian-dong (author)

    Conference:

    First International Symposium on Transportation and Development Innovative Best Practices ; 2008 ; Beijing, China



    Publication date :

    2008-04-04




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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