In urban traffic control, the estimation of time-varying turning rates in each entrance of intersection is important to improve system efficiency. This paper describes a stochastic modeling approach to estimate turning rates in entrances of N-leg intersection (N⩾3) in real time. Based on the assumption that point detectors are set on exit lanes of intersections, this paper formulated a discrete-time stochastic model in which a compositive measurement, made up of exits flow measurement and the empirical turning rates, was used. To estimate turning rates, a recursive estimation algorithm was developed which primarily involved the application of a Kalman filter, trucation and normalization procedures. Preliminary model testing was used to explore the feasibility of estimating real-time turning rates using the proposed methdology. The result indicates that the estimation algorithm has a good convergency and the estimation errors are within the range of acceptability.


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    Title :

    Real Time Estimation on Turning Rates of N-Leg Intersections


    Contributors:
    Wu, Zhen (author) / Yang, Xiao-guang (author) / Xu, Feng (author)

    Conference:

    First International Conference on Transportation Engineering ; 2007 ; Southwest Jiaotong University, Chengdu, China



    Publication date :

    2007-07-09




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Real Time Estimation on Turning Rates of N-Leg Intersections

    Wu, Z. / Yang, X.-g. / Xu, F. et al. | British Library Conference Proceedings | 2007



    Estimation of Time-Dependent Turning Fractions at Signalized Intersections

    Chang, Gang-Len / Tao, Xianding | Transportation Research Record | 1998


    Estimation of Time-Dependent Turning Fractions at Signalized Intersections

    Chang, G.-L. / Tao, X. / National Research Council; Transportation Research Board | British Library Conference Proceedings | 1998