Automated speed enforcement system (ASES) has been deployed as a safety countermeasure on Korean roadways to reduce speeding-related traffic crashes; information on ASES locations is mandated to be open to the public. However, because drivers are alerted about enforcement via on-board navigation systems and roadside signs, they can avoid enforcement by momentarily reducing their speeds near ASES locations. This enforcement avoidance behavior (EAB) can induce sudden changes in speed near the enforcement locations and thereby increase risk of crash occurrence. In light of this situation, the present study evaluates the effects of ASES on traffic behavior and safety. An analysis of traffic data shows that drivers indeed diminish their speeds near enforcement locations, and accelerate shortly after passing the locations. To investigate how this behavior affects safety performance, this study, by using Empirical Bayes analysis with comparison groups, compares crash occurrences along a certain section before and after the installation of ASES. The comparative analysis shows that overall crash occurrence dropped by 7.6% on average near the enforcement locations, although the reduction was not significant. However, an average 11% non-significant increase in crash occurrence is also observed in the upstream segment, where enforcement is announced to drivers and traffic starts to diminish speed. The findings suggest that the sudden changes in traffic speed induced by EAB substantially negate the benefits of ASES. Therefore, modification of the design of current ASES is required to mitigate EAB and further improve the effectiveness of ASES.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Enforcement avoidance behavior near automated speed enforcement areas in Korean expressways



    Published in:

    Publication date :

    2015



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    44.80 / 55.84 Straßenverkehr / 55.24 / 44.80 Unfallmedizin, Notfallmedizin / 55.84 / 55.24 Fahrzeugführung, Fahrtechnik



    SPEED ENFORCEMENT SYSTEM AND SPEED ENFORCEMENT METHOD

    OKAMURA TOSHIYUKI / YAMAMOTO HISAYOSHI / KASHIHARA MITSURU et al. | European Patent Office | 2018

    Free access

    Safety Effects of Automated Speed Enforcement Programs

    Thomas, Libby J. / Srinivasan, Raghavan / Decina, Lawrence E. et al. | Transportation Research Record | 2008


    Speed and enforcement

    Bowman, J. / Association for European Transport | British Library Conference Proceedings | 2006


    Effectiveness of Automated Speed Enforcement in Work Zones

    Chitturi, Madhav | Online Contents | 2010


    Review of Automated Enforcement

    K. Fitzpatrick | NTIS | 1991