A system and method are disclosed for using vehicle signature data from a single inductive loop sensor to estimate vehicle speed. Two regressors are calculated from the vehicle signature: the “inverse of the duration” and the “slew rate”. A point is found by normalizing the vehicle signature in amplitude and determining the earliest point in the normalized signature to cross a set threshold. The slew rate is the slope of the normalized vehicle signature at this point. Regression models are generated from empirical data for several vehicle categories. Using the regression model for the category of vehicle and the two regressors vehicle speed is estimated. The regression models have been demonstrated to be robust eliminating the need for site-specific calibration or estimation.


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    Title :

    System and method for single-loop vehicle speed estimation using inductive loop signature data


    Contributors:

    Publication date :

    2020-08-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS





    Individual Vehicle Speed Estimation Using Single Loop Inductive Waveforms

    Sun, C. / Ritchie, S. G. | British Library Online Contents | 1999


    Real-Time Vehicle Classification Using Inductive Loop Signature Data

    Jeng, Shin-Ting (Cindy) / Ritchie, Stephen G. | Transportation Research Record | 2008