隧道群连接段临界安全行车速度研究

在考虑隧道群行车安全的基础上,提出隧道群定义。根据安全行车间距模型提出了停车视距下和跟车状态下的安全行车速度计算公式。分析了隧道群路段摩擦系数、行车速度、反应时间等安全影响要素,给出不同天气、路面条件下各要素的取值,通过理论计算得出了隧道群连接段不同条件安全速度取值,得出不同速度下隧道群连接段的最大安全流量,为隧道群连接段的运营和安全管理提供依据。

Critical Driving Speed Research on Tunnel Group Connection Segments

Considering the traffic safety in a tunnel group, the tunnel group was defined. The formula of critical driving speed in free drive status and car-following status was given according to the safe driving distance model. According to the model, the factors of the tunnel group, such as the coefficient of friction, the speed, the reaction time were analyzed and valued under different weathers and different road surfaces. Then, the critical driving speeds were given in different conditions. The result shows that the critical driving speeds can provide a basis for the safety management in the tunnel group.