无信号控制环形交叉口通行能力改善方案研究

Traffic Capacity Improvement Scheme on No-signal Control Roundabouts

以上海S5/宝安公路环形交叉口改造为典型案例,对城市郊区环形交叉口面临的问题进行剖析,给出了交叉口改造方案,并对比分析了改造前的环形交叉口与改造后的十字信号交叉口的通行能力,指出在城市交通需求日益增加的今天,将无信号控制环形交叉口改造为信号控制十字交叉口能有效提升交叉口通行能力,提升郊区道路交叉口对货车流的适应性,可为城市郊区环形交叉口改造工程提供借鉴。

Based on a case study of the Shanghai S5/Baoan Road, this paper analyzed the traffic problems of urban suburb roundabouts and purposed a modification scheme. The modification scheme was compared with the previous traffic capacity in crossing signalized intersections. The results indicated that with the increase of transportation demand, no-signal control roundabouts were able to increase the traffic capacity and improve the adaptability of truck flow. This case provides reference for urban suburb roundabout modification schemes.