多路汇入交叉口交通组织优化方法

环道组织渠化对于化解多路交叉和畸形交叉的交通冲突具有一定的缓解作用,但面对日益剧增的交通量,该方法的停车延误也随之递增。如何提高多路交叉口的通行效率是大交通量背景下面临的核心问题。以重庆市垫江县黄沙六进口环岛交叉口为研究对象,通过对道路结构、交通量、交通OD等参数实地调查,以及环道数、车道宽度、车道数等设计参数的分析,提出了环岛+信号灯控制方法和类十字交叉交通控制方法两套改进方案。最后利用交叉口平均车辆延误及排队长度作为评价指标,对比分析了不同方案之间的优劣。VISSIM仿真结果表明:相比于环岛配合信号配置交通控制方法,优化后的类十字交叉口控制方法在高峰交通量时更具有优势,其车辆的平均延误时间相比减少9.3 s,通行能力提高了12%。由此可见,类十字交叉方案对于解决多路交叉交通延误问题为相关理论与实践探索提供了很好的借鉴作用。

An Improved Traffic Organization Method for Multi-road Intersections

Roundabout of channel organization has a certain mitigation effect on defusing traffic conflicts in multiway or malformed intersections. But faced with growing surge of traffic, parking delays which also will increase. In the context of large traffic volume, how to improve the efficiency of multi-road intersections is the core issue. In this paper, the Huangsha circle, which is located in Dianjiang County of Chongqing, China, is selected to study the rebuild method based on parameter survey, such as road structure, traffic flow and traffic OD, as well as comprehensive analysis of the lanes of roundabout, lane width, number of lanes, and proposed two improvements. Finally, used the average vehicle delay and queuing length of the intersection as the evaluation indexes, Contrast analysis of the advantages and disadvantages between different programs. The VISSIM simulation results show that