The upgrade freeway section is an accident-prone roadway segments. This paper studied the operation characteristics of traffic flow on the upgrade section using VISSIM simulation software based on the survey data. The speed standard deviation coefficient (Cv) and the average changing times between car and large vehicles were selected as the indexes to evaluate the impact of large vehicles on traffic safety along upgrade sections and the changes of different slopes and traffic conditions were analyzed. The result shows that the traffic volume and large vehicle mixed rate both affect traffic safety performance on the upgrade section. The upgrade section safety was divided into 3 categories by the speed standard deviation coefficient. The results could provide the improvement guidance for traffic facilities to ensure traffic safety on the upgrade section.


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    Title :

    Traffic Safety Performance Investigations Impacted by Large Vehicles along Upgrade Freeway Sections


    Contributors:
    Zheng, Zhanji (author) / Xiang, Qiaojun (author) / Gu, Xin (author) / Du, Zhigang (author)

    Conference:

    17th COTA International Conference of Transportation Professionals ; 2017 ; Shanghai, China


    Published in:

    CICTP 2017 ; 4551-4561


    Publication date :

    2018-01-18




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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