Microsimulation models are widespread for the analysis of roundabouts operational performance providing realistic modelling of vehicle movements. These models are based on many independent parameters to describe traffic and driver behaviour, which need to be calibrated in order to better match field data. In practice, despite the well-recognized importance of calibration and validation processes, simulation is conducted under default values because of difficulties in field data collection and deficiency in available guidelines. These issues can be faced by using transferability methodologies that allow applying the parameters calibrated for a case study to other similar locations. Therefore, this paper investigates the suitability of the transferability procedure adopting both the application-based and estimation-based approaches, by considering two roundabouts and a microsimulation tool. A Genetic Algorithm technique was used to determine the best estimates of these model parameters. After that, the authors compared field-measured with simulated queue lengths, considering four different scenarios. The results show that the application of Wiedemann 99 parameters calibrated for the first case study to the second one allows reducing the RMSNE more than 50%, thus confirming an acceptable level of transferability of these parameters between the two case studies.


    Access

    Download


    Export, share and cite



    Title :

    Investigating the Transferability of Calibrated Microsimulation Parameters for Operational Performance Analysis in Roundabouts


    Contributors:


    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown






    Microsimulation-based passenger car equivalents for heavy vehicles driving turbo-roundabouts

    Orazio Giuffrè / Anna Granà / Sergio Marino et al. | DOAJ | 2016

    Free access

    Microsimulation-based passenger car equivalents for heavy vehicles driving turbo-roundabouts

    Giuffrè, Orazio / Granà, Anna / Marino, Sergio et al. | British Library Online Contents | 2016


    Microsimulation-based passenger car equivalents for heavy vehicles driving turbo-roundabouts

    Giuffrè, Orazio / Granà, Anna / Marino, Sergio et al. | British Library Online Contents | 2016