Flow speed describes general traffic operation conditions on a segment of roadway. It is also used to diagnose special conditions such as congestion and incidents. Accurate speed estimation plays a critical role in a traffic management or traveler information system. Data from loop detectors has been a primary source for traffic information, and single loop detectors are the predominant source in many places. However, single loop detectors do not produce speed output. Several methods have been developed for speed estimation using single loop detector outputs. These methods, however, have their limitations and are often inaccurate under various traffic conditions. Some of the methods are also difficult to implement. This research project seeks to improve on the existing methods and to increase the accuracy of speed estimation. A new methodology, the Unscented Kalman Filter (UKF) method, is developed for this purpose. Datasets collected from three different freeway locations are used for speed estimation and evaluation of the proposed method. The results show that the proposed method generates accurate and stable estimations of speed. The proposed method is superior to existing methods.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Accurate Speed Estimation Using Single Loop Detector Data


    Contributors:
    Y. Zhang (author) / Z. Ye (author) / Y. Xie (author)

    Publication date :

    2006


    Size :

    74 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Unscented Kalman Filter Method for Speed Estimation Using Single Loop Detector Data

    Ye, Z. / Zhang, Y. / Middleton, D. R. et al. | British Library Conference Proceedings | 2006



    Unscented Kalman Filter Method for Speed Estimation Using Single Loop Detector Data

    Ye, Zhirui / Zhang, Yunlong / Middleton, Dan R. | Transportation Research Record | 2006


    Unscented Kalman Filter Method for Speed Estimation Using Single Loop Detector Data

    Ye, Zhirui / Zhang, Yunlong / Middleton, Dan | Transportation Research Record | 2006


    A single loop detector-based freeway speed estimation

    Sin, Jaeyong / Lee, Seung-Hwan / Choi, Keechoo | Springer Verlag | 2002