The WSDOTs dual-loop detectors capability of measuring vehicle lengths makes the dualloop detection system a potential real-time truck data source for freight movement study. However, a previous study found the WSDOT dual-loop detection system was not consistently reporting accurate truck volumes. (Truck volumes estimates by basic length category are developed from the vehicle length measurements produced by the dual-loop detectors.) The problems include undercount, over-count, and misclassification. As an extension of the previous study, this research project investigated and identified possible causes of dual-loop miscount and misclassification under un-congested traffic conditions. A quick remedy method was proposed to improve the performance of the dualloop detection system without replacing any part of the current system hardware or software. A new dual-loop algorithm that can tolerate erroneous loop actuation signals was also developed to improve the performance of the WSDOT loop detection system. The improved dual-loop detection system will provide reliable timely truck volume data. WSDOT will benefit from this work by gaining more reliable volume and vehicle classification data without having to resort to any other traffic detection technologies.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Improved Dual-Loop Detection System for Collecting Real-Time Truck Data


    Beteiligte:
    X. Zhang (Autor:in) / N. Nihan (Autor:in) / Y. Wang (Autor:in)

    Erscheinungsdatum :

    2005


    Format / Umfang :

    pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Improved Dual-Loop Detection System for Collecting Real-Time Truck Data

    Zhang, Xiaoping / Nihan, Nancy / Wang, Yinhai | Transportation Research Record | 2005



    Improved Dual-Loop Detection System for Collecting Real-Time Truck Data

    Zhang, Xiaoping / Nihan, Nancy L. / Wang, Yinhai | Transportation Research Record | 2005


    Using Dual-Loop Event Data to Enhance Truck Data Accuracy

    Cheevarunothai, Patikhom | Online Contents | 2007


    Using Dual-Loop Event Data to Enhance Truck Data Accuracy

    Cheevarunothai, Patikhom / Wang, Yinhai / Nihan, Nancy L. | Transportation Research Record | 2007