雾霾天气低能见度下的交通流仿真研究

Traffic flow simulation study under low visibility in haze and haze

为了研究雾霾天气低能见度下的交通流,结合停车视距模型,建立雾霾低能见度下的交通流微观模型。在数值模拟中,得到了雾霾天气低能见度条件下的时空图,分析了低能见度下不同最大速度的事故率曲线结果表明,与晴天相比,低能见度下,交通拥堵的频率和持续的时间都相对较长。并仿真得到了不同密度下的道路车辆限速值,仿真结果与道路能见度限速标准相一致。研究结果对于雾霾天气下交通管理与控制、安全出行都具有重要的意义。

In order to study the traffic flow under the low visibility of fog and haze,the microscopic model of traffic flow under the low visibility of haze is established by combining the stopping sight distance model.In the numerical simulation,we get the space-time diagram under the condition of low visibility in fog and haze weather,and analyze the results of different accident rate curve with maximum speed under low visibility.The results show that the frequency and duration of traffic jam are relatively long under low visibility compared with sunny days.The speed limit value of road vehicles with different density is obtained by simulation.The simulation results are consistent with the speed limit standard of road visibility.The results are of great significance to traffic management and control and safe travel in fog and haze weather.