高速公路隧道入口段障碍物视认距离实验研究

Experimental Study on Visual Distance of Obstacles at Entrance Section of Expressway Tunnel

摘要:

为研究障碍物视认距离受车速与布置距离的影响，招募了6位参与者在60、80、100 km/h三个速度水平下进行高速公路隧道实车实验。结果发现，参与者对障碍物的视认距离随着速度的增加而显著减小，在三个速度水平下，视认距离与障碍物布置的位置之间呈现V形变化趋势，最短视认距离出现在障碍物离洞口约60～80 m，其值低于或远低于该设计速度下的停车视距要求。偏相关性分析显示，运行速度、障碍物位置与距洞口70 m轴线相对距离这两个指标与障碍物视认距离呈现显著的正相关性。研究成果对当前我国高速公路隧道入口段的照明过渡设计提出更高要求。

Abstract:

To study the influence of vehicle speed and layout distance on obstacle visual distance, six participants were recruited to conduct the real vehicle experiments in the expressway tunnel at three speed levels of 60 km/h, 80 km/h and 100 km/h. The results show that the visual distance of the participants towards the obstacles significantly decreases with the increase of speed. At three speed levels, there is a V-shaped variation trend between the visual distance and the obstacle arrangement. The shortest visual distance appears when the obstacle is about 60~80 m away from the entrance, which is lower or much lower than the stopping sight distance requirement at this design speed. The partial correlation analysis shows that the running speed, obstacle position and relative distance from the entrance 70 m axis are significantly positively correlated with the visual distance of the obstacle. The research results put forward the higher requirements for the lighting transition design at the entrance section of expressway tunnels in China.