紧急避险车道驶出角度及引道长度设置

Departure Angle and Approach Length of Truck Escape Ramp

摘要:

通过UCWin Road Ver.9驾驶模拟仿真平台测试5名驾驶员144次驶入紧急避险车道的运动参数.依据方向盘转速提取调整段长度、调整时间与最小转向半径指标，分析3个指标与驶入速度、驶出角度的相关性，并基于二阶聚类模型提出紧急避险车道驶出角度与引道长度设置范围.研究结果表明：紧急避险车道驶出角宜在5°以内，最大宜在12.5°以内，且必须在引道设置超高.引道设计长度宜采取调整时间作为控制指标，驶出角在5°以内时引道长度为6 s设计行程，驶出角在5°~12.5°时引道长度为9 s设计行程.

Abstract:

The motion data about the motor vehicle driving into truck escape ramp for 144 times by 5 drivers were obtained by driving simulation on UCWin Road Ver.9. Then the adjustment length, time and the minimum turning radius were extracted on basis of the steering velocity indexes. An analysis was made of the correlation between the abovesaid three indexes and the operation speeds, departure angles. Then, the setting range of the departure angle and the approach length was proposed based on two step cluster analysis. Research result indicates that the departure angle of truck escape ramp should be within 5°. The maximum departure angle should be controlled within 12.5° and the super elevation must be set during approach of truck escape ramp. Adjustment time is selected as the design index of the approach length. The required time value is 6 s when the efflux angle is within 5° whereas the value is 9 s when the efflux angle is between 5° and 12.5°.