Highway intersections experience high numbers of traffic accidents. There are two traditional evaluation methods for intersection safety analysis. The direct assessment method is based on statistics of traffic accidents and the indirect method is based on the traffic conflict technique. While both methods rely on traffic data collected after intersections are built, this paper presents a method which evaluates the intersection safety during the intersection design stage. In order to develop the model, the influences of model objective factors are analyzed. Based on the analysis results, a main model is developed based on the conflict points and traffic flow, and a correctional model is established according to geometry property and traffic signs. The main model and correctional model are eventually combined for the purpose of real world applications. In the Jiangsu Province Coastal Highway Project, the safety level of service is divided into 4 levels according to the calculated values of the 40 intersections. A safety evaluation and optimization scheme is presented accordingly. The method is proved to be feasible in evaluating intersection safety on the design stage by comparing the calculated values before and after intersections improvement.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Applications of the Safety Level of Service Method in Safety Evaluations of Intersections at the Design Stage


    Contributors:
    Lu, Jian John (author) / Bi, He-zheng (author) / Lu, Lin-jun (author) / Zhu, Sheng-xue (author)

    Conference:

    The Twelfth COTA International Conference of Transportation Professionals ; 2012 ; Beijing, China


    Published in:

    CICTP 2012 ; 2685-2695


    Publication date :

    2012-07-23




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Level-of-Safety Service for Safety Performance Evaluation of Highway Intersections

    Lu, Jian / Pan, Fuquan / Xiang, Qiaojun | Transportation Research Record | 2008


    Safety Level of Service at Highway Signalized Intersections

    Pan, F. / Lu, J. / Xiang, Q. et al. | British Library Conference Proceedings | 2007


    Safety Level of Service at Highway Signalized Intersections

    Pan, Fuquan / Lu, Jian / Xiang, Qiaojun et al. | ASCE | 2007


    Safety Evaluations for Skewed Intersections on Low-Volume Roads

    Chittoori, Bhaskar C. S. / Khanal, Mandar / Harelson, Dan | Transportation Research Record | 2015