基于不良天气下的单点信号灯控制优化

在不良天气条件下对单点交叉口的信号控制优化,是能够使得车辆在不良天气条件下交叉口延误降低、降低交通事故率、增大交通安全系数的重要手段.本文首先通过对目标城市——柳州市的天气环境进行调查,结合柳州市气象局的资料公开发布,将柳州市存在的雨、雾、霾天气进行聚类分析,将各种天气按照对交叉口延误和饱和车头时距的影响分为一级、二级...

Control Optimization of Single Point Signal Lamp based on Bad Weather

The signal control optimization of single point intersection under bad weather conditions is an important means to reduce intersection delay,reduce traffic accident rate and increase traffic safety factor.Firstly,through the investigation of the weather environment of the target city Liuzhou City,combined with the public release of the data of Liuzhou Meteorological Bureau,this paper makes a cluster analysis of the rain,fog and haze weather in Liuzhou City,and divides all kinds of weather into class Ⅰ,class Ⅱ and class Ⅲ weather according to the impact on intersection delay and saturated headway.Then,the intersection under all levels of weather conditions is optimized by Webster method.Through the improvement of yellow light duration and road traffic volume,the improved Webster method is proposed to reoptimize the bad signals of intersection under primary,secondary and tertiary weather conditions.Through the delay analysis of the optimized intersection,the results show that different signal timing at all levels of bad weather can effectively reduce the traffic delay and improve the intersection capacity.