Several factors of freeway mainlines, exit ramp sections, and cross-roads, such as geometric design, environment, vehicle/driver characteristics, and traffic features, may have significantly impacts on crash injury severity at freeway exit ramps. Freeway exit ramps are defined as the sections from the painted nose to the ramp terminal, and provide limit accesses from freeway mainlines to cross-roads. To explore the impacts and address the significant factors, injury severity prediction models was developed in this paper using three regression technologies: Ordered Probit, Partial Proportional Odds, and Heterogeneous Probit. The analysis results showed that ramp configuration (Diamond, Free-flow Loop, Outer Connection, and Parclo Loop) has significant impacts on crash injury severity at exit ramp sections. Diamond ramp is safer than other configurations while Outer Connection seems to increase crash injury severity than other ones. Other significant factors include lane configuration, channelization at ramp terminals, distance between ramp terminal and the first intersection on crossroads, speed limit on ramps and mainlines, shoulder width on ramps, and alcohol/drug involvement.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Exploring Impacts of Factors Contributing to Injury Severity at Freeway Exit Ramps


    Beteiligte:
    Wang, Zhenyu (Autor:in) / Lu, Jian J. (Autor:in) / Zhang, Zhao (Autor:in)

    Kongress:

    First Congress of Transportation and Development Institute (TDI) ; 2011 ; Chicago, Illinois, United States


    Erschienen in:

    Erscheinungsdatum :

    11.03.2011




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch