This paper puts forward two revised approaches for estimating the real-time O-D flows in freeway corridors. The first approach is formulated in the form of parameter optimization (PO), with the objective function to minimize the absolute deviations between estimated and observed traffic counts. The second approach is formulated as a state-space model using Kalman filtering (KF), with O-D flow deviations as state vectors. These two models make full use of information from ramp traffic counts and mainline flow measurements, which are provided by traffic surveillance systems. The models also take into account the traffic delay by integrating the dynamic route travel time, which is estimated using a recursive method reported in this paper. A genetic algorithm is designed to solve the PO model, as well as an extended KF to solve the state-space model. The results of simulation examples indicate that the proposed approaches are rather promising for potential applications.


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    Title :

    Revised Approaches for Estimation of Time-Varying Origin-Destination Flows in Freeway Corridors


    Contributors:
    Pengpeng, Jiao (author) / Huapu, Lu (author) / Harata, Noboru (author)

    Conference:

    Ninth International Conference on Applications of Advanced Technology in Transportation (AATT) ; 2006 ; Chicago, Illinois, United States



    Publication date :

    2006-08-04




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




    Revised Approaches for Estimation of Time-Varying Origin-Destination Flows in Freeway Corridors

    Jiao, P. / Lu, H. / Harata, N. et al. | British Library Conference Proceedings | 2005




    The real time estimation of origin-destination matrices for freeway corridors

    van der Zijpp,N.J. / Hamerslag,R. / Delft Univ.of Technology,NL | Automotive engineering | 1993


    93AT040 The Real Time Estimation of Origin-Destination Matrices for Freeway Corridors

    Van der Zijpp, N. J. / Hammerslag, R. / ISATA et al. | British Library Conference Proceedings | 1993