基于模型预测的城市快速路匝道流量协调控制

为保证城市快速路处于最大通行能力状态,提出了城市快速路交通流量的一种非线性模型预测方法,在此基础上,对快速路各入口匝道流量进行协调控制.以城市快速路某一拥挤路段为例进行了仿真研究,结果表明,该方法不仅能够有效地消除交通拥挤,维持主线车流稳定,而且匝道调节率平稳,同时该控制方法能保证各入口匝道交通需求的公平性.

Coordinated control of urban expressway ramp flow based on model prediction

Ramp metering is one of the most important parts of expressway traffic control.In this paper,a flow prediction method based on nonlinear model is adopted by the prediction of expressway flow,the multiple ramp flow of the expressway is coordinatedly controlled for the expressway running on the largest capacity state.A traffic congestion sector of a expressway is simulated,the results show that this coordinated control method can efficiently eliminate traffic congestion,the multiple ramps flow metering rate is smooth,and expressway traffic flow is stable,in the meanwhile,the multiple ramps are equal.