基于改进AMOC的北京快速环路协调控制策略

根据北京快速环路的交通流特性及出入口间距短、交织严重的特点,改进了基础模型METANET的节点模型和路段模型,在此基础上,建立了非线性最优控制模型,给出了离散性最优出入口协调控制系统解.以北京二环快速路为实例,将采用改进最优控制(AMOC)策略的仿真结果与实测环路数据的交通状态进行比对,结果表明采用改进AMOC能使快速路交通流密度维持在期望的密度范围内,排队长度也较小,路网所有车辆旅行总时间下降18.4%.

Coordinated Control Strategies of Beijing Ring Freeway Based on Improved AMOC

According to the traffic flow characteristics, the short passageway distance and the serious interweaving of Beijing ring freeway, the node and road section models of the basic model METANET are both improved. Accordingly, a nonlinear optimal control model is established, and a solution to the coordinated control system of pa-ssageway is obtained with optimal discreteness. Afterwards, by taking Beijing ring freeway for example, a comparison is made between the simulated results based on the improved AMOC strategies and the actual traffic status. The results show that the improved AMOC strategies help to maintain the traffic density in a desired range with relatively short queue length, and reduce the total travelling time of all vehicles in the road network by 18.4%.