Physical reasons for a crucial difference between the results of a three-phase theory developed recently (Kerner 2011 Phys. Rev. E 84 045102(R); 2013 Europhys. Lett. 102 28010; 2014 Physica A 397 76) and the classical theory are explained. Microscopic characteristics of traffic passing a traffic signal during the green signal phase and their dependence on the duration of the green phase have been found. It turns out that a moving synchronized flow pattern (MSP), which occurs in under-saturated traffic at the signal, causes ‘compression’ of traffic flow: the rate of MSP discharge can be considerably larger than the saturation flow rate of the classical traffic theory of city traffic. This leads to a considerably larger rate of traffic passing the signal in comparison with the saturation flow rate. This effect together with traffic behavior at the upstream queue front explains the metastability of under-saturated traffic with respect to a random time-delayed traffic breakdown.


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    Title :

    Traffic breakdown at a signal: classical theory versus the three-phase theory of city traffic


    Contributors:

    Published in:

    Publication date :

    2014


    Size :

    36 Seiten, 51 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






    Probabilistic Breakdown Phenomenon at On-Ramp Bottlenecks in Three-Phase Traffic Theory

    Kerner, Boris S. / Klenov, Sergey L. | Transportation Research Record | 2006


    Probabilistic Breakdown Phenomenon at On-Ramp Bottlenecks in Three-Phase Traffic Theory

    Kerner, B. S. / Klenov, S. L. / National Research Council (U.S.) | British Library Conference Proceedings | 2006


    Probabilistic Breakdown Phenomenon at On-Ramp Bottlenecks in Three-Phase Traffic Theory

    Kerner, Boris / Klenov, Sergey | Transportation Research Record | 2006