以避险车道入口处的竖曲线半径最小值和最小长度值为研究对象,通过分析避险车道的组成、纵断面的类型,从缓和对驾驶员的冲击并保证驾驶员的操作工效、使驾驶员在引道上有足够的时间调整方向准确驶入制动车道、满足夜间失控车辆进入避险车道视距要求3个方面分析研究,最后综合提出了不同入口速度时,避险车道入口处竖曲线最小半径和最小长度设计指标。 Taking the minimum value and the minimum length of vertical curve radius at the entrance of hedging lane as the research object, by analyzing the composition of the safe-haven lane and the type of longitudinal section, the impact on the driver is mitigated and the driver’s operation efficiency is ensured. There is enough time on the approach road to adjust the direction into the brake lane to meet the requirements of night-time runaway vehicles into the lane of sight requirements from three aspects of analysis and research, and finally put forward different entry speeds, the safe entrance to the vertical curve Minimum radius and minimum length design specifications.