The number and arrangement of lanes on freeway entrance ramps are an important aspect of freeway geometric design. The primary objective of this paper is to explore the impacts of the number and arrangement of lanes on freeway entrance ramps on the safety performance of freeway merging areas. Four different types of entrance ramps were considered. Type 1 and type 2 are one-lane entrance ramps while type 3 and type 4 are two-lane entrance ramps. Cross-sectional comparison was conducted for comparing crash frequency and crash severity between different types of freeway entrance ramps. A combined crash prediction model was developed to identify the different factors that contribute to the crashes reported at selected freeway segments. Based upon the model, replacing a type 1 with a type 2 will result in 63.18% more total crashes. Replacing a type 4 with a type 3 will increase total crashes by 8.84%.


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    Titel :

    Exploring Safety Impacts of the Number and Arrangement of Lanes on Freeway Entrance Ramps


    Beteiligte:
    Zhang, Guoqiang (Autor:in) / Wang, Zhenyu (Autor:in)

    Kongress:

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


    Erschienen in:

    CICTP 2017 ; 4466-4474


    Erscheinungsdatum :

    18.01.2018




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Analysis of Vehicle Activity on Freeway Entrance Ramps

    Lederer, P. R. / Coordinating Research Council | British Library Conference Proceedings | 2002