雾天环境下高速公路路径诱导方案

A Case Study of Traffic Route Guidance for Expressway in the Foggy Environment

针对雾天环境下高速公路能见度低、道路通行效率下降等问题,对交通流均衡模型进行改进,模拟雾天下驾驶员路径选择行为.以交通流分配模型为基础,构建以大型车比例、路段长度、天气状况、交通状况为因素的高速公路路径选择模型,并以江西九绕高速公路为例,用蒙特卡罗算法进行求解,得出分配的最优解.研究结果表明:模型与选取的影响因素均具有较强的可行性,可以保证雾天环境下的行车安全与通行效率;制定的分流诱导策略具有一定的引导效果.

Due to the reduced visibility,decreased road traffic efficiency and other issues of expressway in the foggy environment,the traffic flow model is modified to simulate the drivers＇ route choices for expressway under foggy weather.Based on this model,a route choice model was established considering the factors including different types of vehicles,road length,weather conditions,and traffic conditions etc.Furthermore,the Monte Carlo method was used to get the optimal solution by taking Jiurao expressway in Jiangxi province as an example.The research results show that the models and the selected influencing factors have strong feasibility,which can guarantee the traffic safety and efficiency in the foggy environment.