The invention relates to a non-signalized intersection traffic conflict identification and risk assessment system and method, and the method comprises the steps: extracting the world coordinates and the driving speed of a road user from the video data of a non-signalized intersection, so as to deduce a safety distance; according to the safety distance and the world coordinates of the road users, determining a conflict domain range, judging whether the two road users conflict or not, and if yes, judging whether the two road users conflict or not; if not, continuing to determine a conflict area, then sequentially calculating the distance between the tracks of the road users, constructing a conflict point set, obtaining a frame to which each conflict point in the conflict point set belongs, determining a conflict event record to calculate a PET value, and classifying the conflict severity by combining a preset threshold range to obtain a conflict severity evaluation result. Compared with the prior art, the traffic conflict at the non-signalized intersection can be accurately identified, and the conflict risk can be accurately evaluated according to the microscopic driving behavior of the conflict object.
本发明涉及一种无信号交叉口交通冲突识别与风险评估系统及方法,该方法包括:从无信号交叉口的视频数据中提取道路使用者的世界坐标和行驶速度,以推演得到安全距离;根据安全距离以及道路使用者的世界坐标,确定冲突域范围,判断两个道路使用者之间是否发生冲突,若判断发生冲突,则继续确定冲突区域、之后依次计算道路使用者轨迹间距离、构建冲突点集合、获取冲突点集合中每个冲突点所属的帧、确定冲突事件记录,以计算得到PET值,再结合预设阈值范围,对冲突严重程度进行分类,得到冲突严重性评估结果。与现有技术相比,本发明能够对无信号交叉口交通冲突进行准确识别,同时实现根据冲突对象的微观行驶行为准确评估冲突风险。
Signal-free intersection traffic conflict identification and risk assessment system and method
一种无信号交叉口交通冲突识别与风险评估系统及方法
2024-11-05
Patent
Electronic Resource
Chinese
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS |
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