基于变点分段交通行为分析的公路隧道照明理论研究

在分析现行国内外公路隧道照明理论局限与不足的基础上，首先将交通量由小到大变化的曲线依次划分为0、a、b、c共掣个点，o点交通量为0，c点达到最大通行能力，a点和b点分别为交通自由流和拥挤流的临界点；其次分析分段交通行为、行车速度、安全距离与照明亮度需求的关系；最后提出考虑了交通流构成并满足停车视距的公路隧道照明亮度需求确定方法，其照明设计参数停车视距，融合了交通量、行车速度，安全距离，更符合行车实际情况，既保障了行车安全，又实现了照明节能。

Research of Highway Tunnel Lighting Theory Based on Traffic Behavior Analysis

Based on analysizing the theory of limitation and deficiency of the current domestic and foreign highway tunnel lighting, the traffic volume time curves were divided into 4 points, that is, ~ a, ~ and c. At point ~ the traffic volume was O, c reached the maximum capacity, a and bwere respectively critical points of crowded traffic and free stream flows. Then, the relationship of piecewise traffic behavior, driving speed, safety distance and the lighting brightness demand was analyzed. At last, a highway tunnel lighting brightness requirement determination method, considering the requirement of traffic flow composition and stopping sight distance, whose lighting designed parameter ＂stopping sight distance＂ integrating the traffic volume, vehicle speed and safety distance, was presented, which fitted the actualtraffic situation. This highway tunnel lighting theory could not only ensure the driving safety, hut also realize the energy-saving lighting.