摘要
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。
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 op- eration and lane-changing operation. In accordance with the vehicle safety-acceleration, a non-linear safety evaluation model was presented. By using the traffic software Vissim, a micro-analysis method was used to evaluate the safety of a mountain freeway.
出处
《交通信息与安全》
2009年第4期84-87,共4页
Journal of Transport Information and Safety
关键词
高密度交通流
车辆碰撞约束
安全评价
high-density traffic flow
vehicle collision restriction
safety evaluation
