基于主线拥堵场景的快速路级联信号控制方法

城市快速路高峰时段已经呈现出常态性拥堵，对快速路主线拥堵进行疏导尤为必要.本文通过在主线和入口匝道进行三级交通检测判别，设计了多级联动的信号控制流程与实现方式，构建了不同拥堵程度下的分级响应控制策略，基于瓶颈点通行能力最大化下的实时信号控制算法及最大排队长度限制下的实时信号控制算法，建立了主线及匝道车道开关闭、汇合处信号灯控制、主线动态限速、交通信息诱导等于一体的快速路级联信号控制方法.仿真分析结果表明，在主线不同拥堵程度下采取的级联信号控制方法，可以有效提升快速路主线平均车速，并未导致匝道排队的恶化，局部路网平均延误均有明显降低.

Multilevel Coordinate Signal Control Method of Expressway Based on Main Line Congestion Condition

Frequent congestion has appeared in urban expressway during peak period, so it is necessary to guide the main line congestion of expressway. In this paper, through the three-level traffic detection and discrimination in the main line and on ramp, the multi- level coordinate signal control process and implementation mode are designed, and the hierarchical response control strategy under different congestion levels is constructed. Based on the real-time signal control algorithm under the bottleneck capacity maximization and the real-time signal control algorithm under the maximum queue length restriction, the multilevel coordinate signal control method is established, which integrates the opening and closing of the main line and ramp lane, the signal light control at the junction, the dynamic speed limit of the main line and the traffic information guidance. The simulation results show that the method can effectively improve the average speed of the main line of the expressway, which does not lead to the deterioration of ramp queuing, and the average delay of the local road network is significantly reduced.