The invention provides a traffic conflict identification method based on a risk area. The method comprises the following steps: (1) obtaining vehicle trajectory data of a conflict analysis target vehicle pair in an analysis area; (2) intercepting all time slices, possibly having traffic conflicts, of the vehicle pair, and carrying out steps (3)-(6) on all sampling moments in the time slices; (3) establishing a risk area, and calculating area arrival time TTR of the risk area; (4) calculating an intra-domain continuous distance dIR of the risk region; (5) calculating a driving state correlation index TRSD; (6) calculating a conflict hidden danger factor CRF, and carrying out normalization processing through a variable form of a Sigmoid function to obtain a potential collision index PCIRR based on a risk area; and (7) after traversal of all moments where traffic conflicts possibly exist is completed for the vehicle pair, drawing a time-varying broken line graph of a potential collision index PCIRR value of the vehicle pair in all time slices where traffic conflicts possibly exist based on a risk area, and marking a PCIRR conflict identification threshold interval in the graph. The time slice of the broken line in the interval is the time slice of the conflict of the vehicle pair. Compared with the prior art, the method provided by the invention can more completely express the collision risk state in the conflict process, can be applied to traffic conflict identification in various driving scenes, and has good accuracy in identification results.

    本发明提供了一种基于风险区域的交通冲突识别方法,该方法包括如下步骤:(1)获取分析区域内的冲突分析目标车辆对的车辆轨迹数据;(2)截取该车辆对的可能存在交通冲突的所有时间片段,并对其中的所有采样时刻进行步骤(3)‑(6);(3)建立风险区域,计算风险区域的区域抵达时间TTR;(4)计算风险区域的域内持续距离dIR;(5)计算行驶状态关联指标TRSD;(6)计算冲突隐患因数CRF,并通过Sigmoid函数的变形式进行归一化处理,得到基于风险区域的潜在碰撞指数PCIRR;(7)对该车辆对完成所有可能存在交通冲突的时刻的遍历之后,绘制该车辆对在可能存在交通冲突的所有时间片段内的,基于风险区域的潜在碰撞指数PCIRR值的随时间变化折线图,并在图中标注PCIRR冲突识别阈值区间。折线位于该区间内的时间片段,即为该车辆对存在冲突的时间片段。与现有技术相比,本发明提供的方法能够比较完整地表达冲突过程中的碰撞风险状态,能够应用于各种驾驶场景下的交通冲突识别,识别结果均具有良好的准确性。


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    Title :

    Traffic conflict identification method based on risk area


    Additional title:

    一种基于风险区域的交通冲突识别方法


    Contributors:
    LI JIANJUN (author) / ZHANG CHENCHEN (author) / FAN ZHENJIA (author) / SHI DENGDENG (author) / SUN KAIYU (author) / LIAO YANKUN (author) / ZOU YAJIE (author) / ZHANG TIANREN (author)

    Publication date :

    2024-07-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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