拥堵条件下考虑相邻路口的可变导向车道自适应控制

An Adaptive Control of Variable Lane Considering Adjacent Intersections Under Congested Condition

为缓解因交通流向不均衡引发的路口拥堵状况,提出考虑相邻路口的可变导向车道自适应模型,主要包括:路口拥堵判别和多路口自适应控制。利用Matlab对路口转向不均衡性及拥堵状态进行分析,并使用VISSIM及其VISVAP通过案例对所提出模型和方法的有效性进行验证。结果表明:在流向不均衡显著的晚高峰,与固定时段进行车道切换的原方案相比,采用自适应控制模型,设有可变导向车道的关键路口及其相邻路口的通行能力提高13.59%~19.13%、排队长度降低24.94%~38.72%、车均延误降低24.61%~34.72%,说明模型能有效提高路口在通勤高峰期的通行效益,降低溢流风险。

In order to alleviate the traffic congestion caused by the unbalanced traffic flow,a variable approach lane adaptive model considering adjacent intersections is proposed,which mainly includes:road congestion analysis and multi-intersection adaptive control. This paper uses Matlab to analyze the uneven turning and congestion of intersections, and uses VISSIM and VISVAP to verify the effectiveness of the proposed model and method through a case study. The results show that: in the evening peak with significant imbalance of flow direction,compared with the original scheme of lane switching in fixed time period,by adopting adaptive control model,the traffic capacity of key intersections with variable approach lanes and their adjacent intersections is improved by 13. 59% ~19. 13%,the queue length is decreased by 24. 94% ~ 38. 72%,and the average vehicle delay is decreased by 24. 61% ~ 34. 72%. The results show that the proposed model can effectively improve the traffic efficiency of intersections during rush hour and reduce the risk of overflow.