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为建立道路交叉口防撞系统,提高交通安全水平,对交叉口车辆碰撞动态风险的估计模型及其仿真评价进行研究。分析了交叉口区域内的车辆碰撞类型,基于风险的概率内涵,提出了一种新的交叉口车辆动态风险估计概率模型;运用VISSIM微观交通仿真软件模拟常见的车辆运行场景,利用仿真输出的数据计算风险值并进行评价,将结果与其他模型产生的计算结果进行比较。结果表明:该风险估计模型易于确定碰撞警告阈值,适用于道路交叉口车辆防撞系统。
In order to establish the collision avoidance system of road junctions, improve the traffic safety level, and to study the estimation model of dynamic risk of vehicle collision at intersection and its simulation evaluation. Based on the probabilistic connotation of risk, a new probabilistic model of vehicle dynamic risk estimation at intersection was proposed. VISSIM micro-traffic simulation software was used to simulate common vehicle operating scenarios and the simulation output data The risk values are calculated and evaluated, and the results are compared with those generated by other models. The results show that the risk estimation model can easily determine the collision warning threshold and is suitable for the vehicle collision avoidance system at road intersections.