路口车辆冲突与碰撞的安全边界条件模型

Safety boundary condition model based on vehicle intersection conflict and collision

为降低路口区域交通事故率,研究路口车辆冲突与碰撞的安全边界条件模型.采用路口碰撞场景中的车辆碰撞剩余时间(TTC)和预估通行侵入区域时间差(EPET)2个动态特性参数,基于危险等级评价指标和逻辑回归方法,构建路口安全边界条件模型,基于中国实地运行试验数据库(China-FOT)和中国交通事故深入研究数据库(CIDAS)的相关数据确定了2种路口场景的安全边界条件.利用PreScan、CarSim和Simulink进行仿真实验,对所建立模型进行验证,结果表明,模型确定的安全边界条件对2种路口场景的交通事故率分别降低了94%和86%,表明本文模型是有效的.

In order to reduce traffic accident rate and mitigate collision damage in the intersection area,it is necessary to develop a safety boundary condition model,which is established based on vehicle intersection conflict and collision cases.Two vehicle dynamic parameters,time to collision(TTC)and estimating post encroachment time(EPET),are considered to analyze for the vehicle intersection conflict and collision scenarios.Using the hazard level model and logistic regression method,the intersection boundary safety condition model is established based on the TTC and EPET parameters of vehicle braking time.Based on the China field operation test database(China-FOT)and the China in depth accident study database(CIDAS),two intersection scenario safety boundary condition are obtained and evaluated by the simulation.PreScan,CarSim and Simulink are used to carry out simulation experiments to verify the established model.The results show that the safety boundary conditions determined by the model reduce the traffic accident rates of two kinds of intersection scenarios by 94%and 86%respectively,indicating that the established model is effective.