摘要
针对雨雾天气下公路交通事故上升与通行能力下降的问题,综合考虑交通安全和通行效率两个因素,提出一种雨雾天气下可变限速控制策略;首先,考虑雨雾天气下道路线形对车辆速度和道路通行能力的影响,建立雨雾天气下动态交通流模型;然后,根据驾驶员可视距离、路面附着系数和道路曲线等因素确定雨雾天气下车辆最大安全速度;最后,采用自适应遗传算法对包含总行程时间和总行驶里程的目标函数进行求解,得到雨雾天气下各路段的限速值;仿真结果表明,所提出的可变限速控制策略有效降低了雨雾天气下公路的行车风险,并缓解了交通拥堵。
The rainy and foggy weather causes the increasing traffic accident and decreasing traffic capacity.In this paper,a variable speed limit control strategy in rainy and foggy weather is proposed by taking the traffic safety and traffic efficiency into consideration.Firstly,considering the influence of road alignment on vehicle speed and road capacity in rainy and foggy weather,the dynamic traffic flow model is established.Then,the maximum safe speed is determined according to drivers’visual distance,road adhesion coefficient and road curve.Finally,adaptive genetic algorithm is used to solve the objective function including total travel time and total mileage,and the speed limit value of each section in rainy and foggy weather is obtained.The simulation results show that the proposed variable speed limit strategy can effectively reduce the traffic risk and traffic congestion in rainy and foggy weather.
作者
张博宇
闫茂德
朱旭
杨盼盼
Zhang Boyu;Yan Maode;Zhu Xu;Yang Panpan(School of Electronic and Control Engineering,Chang an University,Xi an 710064,China)
出处
《计算机测量与控制》
2021年第3期135-139,共5页
Computer Measurement &Control
基金
国家自然科学基金(61803040)
中国博士后科学基金(2018M643556)
陕西省重点研发计划(2020GY-113,2019GY-218)
中央高校基本科研业务费(300102328403,300102320203)。
关键词
雨雾天气
可变限速控制
动态交通流模型
遗传算法
rainy and foggy weather
variable speed limit control strategy
dynamic traffic flow model
genetic algorithm
