速度影响下次近邻车辆换道安全性分析

Safety analysis of next-nearest following vehicle on the impact of lane-changing based on velocity

在换道安全研究中,次近邻车辆是提升换道安全的重要因素。文章基于下一代仿真数据,提取次近邻车辆数据,并引入速度变化强度概念,结合换道初始速度分类分析了次近邻车辆在换道过程中的速度变化情况;对比分析了不同速度变化强度下,直接相邻车辆和次近邻车辆的车头时距与前车速度差的变化关系;使用替代安全措施衡量次近邻车辆刹车碰撞风险。建立速度变化强度、初始速度、速度差与次近邻车辆安全之间的关系,为进一步提升道路行驶安全提供了理论基础。

In research of lane-changing safety problem,the next-nearest following vehicle is an important factor to be considered.Extracting the data of next-nearest following vehicles,the velocity variation of lane changing process was classified and analyzed by introducing the intensity of velocity variation,combined with initial lane changing velocity and based on Next Generation Simulation trajectory data.Then the tendency of time headway varied with its speed difference was compared with following vehicles considering different intensity of velocity variation.One of surrogate safety measures was applicated to measure the braking risk of next-nearest following vehicles.Then the relationship is established between the intensity of velocity variation,initial velocity,speed difference and the safety of the next-nearest following vehicle,which in turn provides theoretical basis for improving driving safety on road.