Application of extreme value theory (EVT) to road safety analysis is gaining interest, thanks to its ability to produce quick and reliable safety evaluations without the use of crash data. Traditionally applied to single collision types and single extreme variables (i.e. surrogate measures of safety), EVT can be further exploited to simultaneously model multiple collision types, with the use of multiple extreme variables. In this paper two bivariate EVT approaches are applied for the safety evaluation of a three-leg unsignalized intersection, considering: (i) two conflict points and a single surrogate measure of safety; (ii) two surrogate measures of safety collected in a single conflict point. Each bivariate analysis was applied with two EVT methods: Component-wise Maxima (CM) and Excesses Over a Threshold (EOT). Bivariate models produced good results, especially with the EOT method, and were able to significantly improve the univariate benchmark results when the two estimation datasets were correlated.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Safety analysis of unsignalized intersections: a bivariate extreme value approach


    Contributors:

    Published in:

    Transportation Letters ; 13 , 3 ; 209-218


    Publication date :

    2021-03-16


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Unsignalized Intersections

    Elefteriadou, Lily | Springer Verlag | 2013


    Unsignalized Intersections: Roundabouts

    Prassas, Elena S. / P. Roess, Roger | Springer Verlag | 2020


    Delay at Unsignalized Intersections

    Brilon, Werner | Online Contents | 2008


    Capacity analysis of unsignalized intersections

    Kyte, Michael | Online Contents | 1999


    Delay at Unsignalized Intersections

    Brilon, Werner | Transportation Research Record | 2008