基于运动学的换道安全间距研究

通过建立基于运动学理论的换道模型并分析主车与原车道前车及目标车辆前后车的速度、加（减）速度及安全距离，研究车辆换道行为的安全性。研究结果表明：车辆在进行换道过程中，换道时间由车道及车辆的宽度、驾驶速度、纵向加速度及驾驶员的特性有关系。研究结果可为车辆安全换道决策提供重要依据。

Safe Distance of Lane Changing Based on Kinematics

By building the mode of lane changing based on the kinematics theory and analyzing the veloci-ty, acceleration （deceleration） and safe distance of vehicles, the paper studies the safety of lane changing. The result shows that the time of lane changing is decided by width of the lane and vehicle, the velocity and longitudinal acceleration of subject vehicle and the characters of driver. The research results may pro- vide an important basis for safety change lane decision of vehicle.