Wide moving jams (WMJ) have been reported for over a decade in the three-phase theory. However, existing studies about wide moving jams have mostly been based on simulation data or limited empirical data. In addition, wide moving jams have been studied by only a few researchers, and identification of wide moving jams is still an important issue. Based on a large amount of real-world floating car data (FCD) in Beijing, this paper discusses the identification of wide moving jams and evaluates their impact on traffic flows. The identification of wide moving jams was studied based on the spatiotemporal characteristics of link-based travel speeds. It was found that wide moving jams were widely recognized. Next, the characteristics of traffic speed and the propagation speed of wide moving jams were studied. The average vehicle speed inside wide moving jams was 8.0    km / h , and the average propagation speed of wide moving jams was 8.7    km / h . Finally, the influence of wide moving jams on traffic flows was quantitatively studied for the 3rd Ring Road in Beijing. This paper contributes to the identification of wide moving jams based on link-based FCD with specific space-time granularity instead of the trajectory-based FCD that has been used in previous studies. Wide moving jams are common occurrences, but they are difficult to identify due to the inappropriate space-time granularity of the data. Wide moving jams show different characteristics when the space-time granularity of the data is different. The engineering applications of the findings in this paper include two aspects: (1) traffic control to avoid traffic breakdown induced by wide moving jams, and (2) predictive routing for travelers according the propagation speed of wide moving jams. The influence of wide moving jams on the probability of traffic breakdown and capacity in wide moving jams are further studied.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Experimental Findings about Wide Moving Jams: Case Study in Beijing


    Contributors:
    Zang, Jin-rui (author) / Song, Guo-hua (author) / E, Ri-ti (author) / Sun, Jian-ping (author) / Zhang, Xi (author) / Yu, Lei (author)


    Publication date :

    2019-04-26




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown



    Scheme for solving traffic jams and updating rail designs in Beijing

    CHEN XIJUN | European Patent Office | 2015

    Free access


    Trams not jams

    British Library Online Contents | 2000


    River ice jams

    Beltaos, S. | British Library Online Contents | 1998


    Trams not jams

    British Library Online Contents | 2001