There is often a desire to use microsimulation models to evaluate road improvements or new traffic management strategies under different weather conditions. However, conventional simulation models do not provide the ability to directly specify weather conditions as an input. Instead, it is necessary to determine ( a) the impact that a specific weather condition has on traffic operations, quantified in terms of the traffic stream parameters (i.e., free speed, speed at capacity, capacity, and jam density); and ( b) appropriate values for the microsimulation model input parameters to generate a simulated traffic stream that has the desired characteristics. This paper addresses this second challenge for the Vissim microsimulation model. On the basis of existing literature, an initial list of 21 input parameters was identified. A sensitivity analysis was performed, and nine key input parameters were selected. A set of simulation runs was conducted; these runs used various combinations of values for the nine input parameters. A neural network model was calibrated and validated with these data. The model requires, as inputs, the free speed, the speed at capacity, the capacity, and the jam density of the traffic stream. The model provides as outputs the values for the nine Vissim input parameters. These values, combined with the default values for the remaining parameters, provide a traffic stream with the desired characteristics. The neural network model has been coded into a software tool, which is available online.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Identifying Parameters for Microsimulation Modeling of Traffic in Inclement Weather


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2017-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Modeling Inclement Weather Impacts on Traffic Stream Behavior

    Hesham Rakha, PhD., P.Eng. / Mazen Arafeh / Sangjun Park | DOAJ | 2012

    Free access

    INCLEMENT WEATHER DETECTION

    GOWDA SHEETHAL NAGARAJA / SHAIK HUSSAIN SHABBEER BASHA / DAKALA JAYACHANDRA | European Patent Office | 2024

    Free access

    Inclement Weather Impacts on Urban Traffic Conditions

    Shang, Pan / Li, Ruimin / Liu, Zhiyong et al. | ASCE | 2015


    Microscopic Analysis of Traffic Flow in Inclement Weather

    H. Rakha / D. Krechmer / G. Cordahi et al. | NTIS | 2009


    INCLEMENT WEATHER VEHICLE SYSTEM

    MANSOUR ROBERT EMAD | European Patent Office | 2019

    Free access