高密度交通流状态下行车安全性分析

在高密度交通流状态下，车辆行驶的自由度下降，相互影响逐渐增大，主要以跟驰行驶和换车道行驶为主。事故统计表明，高密度交通流状态是交通事故多发的主要原因之一。根据行车动力学原理和车辆运行特征，分别构建了跟驰行驶和换车道行驶的安全约束条件。根据不同交通状态下车辆安全制动的加速度，初步建立非线性的行车风险评价模型。借助交通仿真软件Vissim对某山区高速公路路段进行模拟实例分析，能有效地反映高密度交通流状态下车辆行驶的安全性。

Operation Safety Analysis in High-density Traffic Flow

The mutual impact of the vehicles gradually increases with the decrease of the freedom of the vehicles operation in high-density traffic flow.As a result,the traffic accidents happen frequently.Based on the traffic dynamics theory and the characteristics of vehicle operation,the safety-restricted conditions were put forward during car-following operation and lane-changing operation.In accordance with the vehicle safety-acceleration,a non-linear safety evaluation model was presented.By using the traffic soft...