高速公路直线路段突起路标间隔设置方法

基于驾驶人的视觉惰性、视觉警示频率和感觉特性, 分析了突起路标的视觉警示作用, 确定了突起路标的闪现频率, 计算与修正了突起路标的初始间隔。应用ADAMS/Car仿真软件模块, 建立了道路、车辆和突起路标模型, 将车型设置为大型车和小型车, 大型车的车速设置为60、80、100km·h^-1, 小型车的车速设置为80、100、120km·h^-1, 大型车和小型车的方向盘转角均设置为1°、3°、5°。分别对提出的12m间隔与现行规范推荐的15m间隔各进行243次仿真, 分析振动警示效果。仿真结果表明: 在12m间隔下, 平均碾压率为93.1%, 小型车和大型车对应的平均警示率分别为41.7%和5.6%;在15m间隔下, 平均碾压率为93.7%, 小型车和大型车对应的平均警示率分别为33.3%和28.9%;12、15m间隔对小型车都具有较好的振动警示效果, 15m间隔对大型车的振动警示效果更好。当高速公路夜间交通流较大或需要加大交通设施的夜间安全效果时, 可选12m间隔提供良好的视觉连续性和视觉警示效果; 考虑施工维护的方便性和经济性或者大型车比例较大时, 可选择15m间隔。

Setting method of raised pavement marker interval at line section of freeway

Based on the driver's visual inertia, visual warning frequency and feeling feature, the visual warning effect of raised pavement marker was analyzed, the flash frequency of raised pavement marker was determined, and the initial interval of raised pavement marker was calculated and corrected. By using the simulation software module ADAMS/Car, the simulation models of road, vehicle and raised pavement marker were built, vehicle type was set as truck and car, the speed of truck was set as 60, 80, 100 km· h-1 respectively, the speed of car was set as 80, 100, 120 km · h-1 respectively, and the steering wheel angles of truck and car were set as 1°, 3°, 5° respectively. The simulation times were 243 for the calculated 12 m-interval and 15 m- interval recommended in the current specification respectively, and the warning effect was analyzed. Simulation result shows that under the 12 m-interval condition, the average crushing rate is 93.1%, and the average warning rates for ear and truck are 41.7% and 5.6% respectively. Under the 15 m-interval condition, the average crushing rate is 9a. 7%, and the average warning rates for car and truck are33.3% and 28. 9% respectively. Both two intervals have good vibration warning effect on cars, 15 m-interval has a better vibration warning effect on trucks than 12 m-interval. When there is a great traffic flow at night or the safe effect of traffic equipment need to be enhanced at night, 12 m-interval can be chosen to provide a good visual continuity and visual warning effect. When the convenience and economy of construction and maintenance are considered or there is a higher percentage of trucks in traffic flow, 15 m-interval can be chosen.