This study proposes a new method for evaluating the road network vulnerability per unit time: the real-time vulnerability index (RVI). The practical application of the proposed measure in real traffic scenarios is investigated by using empirical data from Shanghai Expressway.To prevent traffic congestion, a critical threshold of RVI (RVI*) is suggested for traffic control. Furthermore, the hysteresis on macroscopic fundamental diagram (MFD) and RVI is further analyzed in the phase transition of traffic states. The results show that RVI can help derive some representative traffic characteristics in real time and dynamically reflect road network vulnerability: when traffic congestion or accidents occur on the road network, the results observed for the traffic hysteresis on MFD and RVI were consistent, and RVI is easier to observe and more suitable for traffic management. The findings prove that RVI is a reliable indicator to help predict the dynamic operation of the road network.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Real-time Vulnerability Analysis of Urban Expressway


    Additional title:

    Y. JI ET AL.
    TRANSPORTATION LETTERS


    Contributors:
    Ji, Yangbeibei (author) / Zhou, Jinjie (author) / Jiang, Hanwan (author) / Xing, Xinru (author) / Gu, Shuangyi (author)

    Published in:

    Transportation Letters ; 16 , 9 ; 959-977


    Publication date :

    2024-10-20


    Size :

    19 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






    Empirical Analysis on Time to Collision at Urban Expressway

    Xu, C. / Qu, Z.W. | British Library Conference Proceedings | 2014


    Empirical Analysis on Time to Collision at Urban Expressway

    Xu, Cheng ;Qu, Zhao Wei | Trans Tech Publications | 2014


    Empirical Analysis on Time to Collision at Urban Expressway

    Xu, Cheng / Qu, Zhao-Wei | Tema Archive | 2014