Equidistant spatial-temporal division is used in the detection of a traffic anomaly. A spatial-temporal subzone is created by dividing one day into several time segments of 30 minutes, each defined as a time subzone; dividing one implemented area into several spatial segments of 200m x 200m, each defined as a spatial subzone; and defining an intersection of one time subzone and one spatial subzone as a spatial-temporal subzone. Historical and real-time GNSS positioning data of floating vehicles is respectively pre-processed into sampled historical and real-time vehicle speed data relating to historical and real-time trajectories. These are used in a finite mixed modelling method to establishing respective historical and real-time travel speed probability distributions. Jensen-Shannon divergence is then used to measure a difference between said historical and real-time travel speed probability distributions and an anomaly index of traffic conditions is determined from said difference. The accuracy of said anomaly index is then evaluated.


    Access

    Download


    Export, share and cite



    Title :

    Method for detecting traffic anomally of urban road with equidistant spatial-temporal division


    Contributors:
    YUCHUAN DU (author) / FUWEN DENG (author)

    Publication date :

    2020-09-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS





    Urban road traffic jam spatial-temporal distribution comprehensive index evaluation method

    HUA JINGYI / LIU DONGBO / GU JINGANG et al. | European Patent Office | 2022

    Free access

    Urban road speed prediction method considering spatial-temporal characteristics of traffic network

    GUO HAIFENG / ZHOU ZISHENG / XU HONGWEI | European Patent Office | 2023

    Free access

    Method for detecting traffic anomaly of urban road

    YUCHUAN DU / FUWEN DENG | European Patent Office | 2019

    Free access