基于动态归类技术的交通流实时运营风险评价

Dynamic-classified Method-based Real-time Risk Audit of Traffic Flow

基于车辆间直接影响和状态传递的特征,提出用以辨识交通流各向异性和运动差异性的动态归类技术.基于车辆微观运动特征和车辆间的相互影响,提出考虑危险情形的交通流运营风险矩阵和状态关联矩阵.制定交通流运营风险的等级判别标准,构建交通流的实时运营风险指数模型.选取某高速公路事故多发路段进行试验,结果表明交通流的运营风险指数与历史交通事故数存在良好的关联性.

Considering the characteristics of direct-effect and state-transfer among vehicles,the dynamic-classified method is first put forward to discriminate anisotropic and diversity of traffic flows.Based on vehicle travelling characteristics and inter-vehicles force,matrixes of related-state and traffic risk are introduced to analyze dangerous condition.Real-time risk index is then set up after constituting traffic flow risk-grades.Experiments on some freeway sections of high-frequency accident validate the relation between traffic flow risk index and historical accidents.