The convenience of vehicle traffic flow models provides flexibility in conducting traffic state estimation based on data collected from moving sensors. In this paper, we propose a Lagrangian-space based travel time estimation model for the non-pipeline corridor. The model improves a previous presented travel time transition model (TTM) into non-pipeline cases by numerically implementing its source term. A numerical experiment based on a simulation model of Nanbei Expressway in Shanghai, China is used to evaluate the approach. The proposed model can track traffic breakdowns and recovery effectively. The mean absolute percentage error (MAPE) of the proposed estimator is 6.75%. The estimation error is caused by the fluctuation of mainline traffic flow. Furthermore, the ramp flow term that numerically implements the analytic source term needs to be rescaled using a coefficient to reduce its impact on numerical error.


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    Title :

    Lagrangian-Space Based Travel Time Estimation Model for Non-Pipeline Corridor


    Contributors:
    Yang, Han (author)

    Conference:

    20th COTA International Conference of Transportation Professionals ; 2020 ; Xi’an, China (Conference Cancelled)


    Published in:

    CICTP 2020 ; 776-787


    Publication date :

    2020-08-12




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English




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