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基于对环形交叉口分流方式的分析,以减少交织区车流量和缩短左转车辆绕行距离为出发点,提出了卫星岛式环形交叉口的设计概念,对现行环形交叉口形式进行了重组和改进:(1)在每条道路末端增设卫星岛;(2)车辆进入中心岛后绕中心岛顺时针单向行驶;(3)分离右转车道。据此设计了卫星岛式环形交叉口的构型。针对卫星岛式环形交叉口的交通组织方式,运用交通流线分析技术,重点分析了左转和调头车辆的运行路径。结果表明:卫星岛式环形交叉口能大幅提高交叉口的通行能力,尤其适用于左转和调头车流量大的交叉口,为现代平面交叉设计提供了一种新选择。
Based on the analysis of the diversion mode of the roundabout, the design concept of the satellite island roundabout is proposed based on the analysis of reducing the traffic volume in the interleaving zone and shortening the bypassing distance of the left-turn vehicle. The current roundabout is reorganized and improved : (1) Additional satellite islands at the end of each road; (2) Vehicles enter the central island and travel clockwise one-way around the central island; (3) Detach the right-turn lane. Based on this, the configuration of satellite island roundabout is designed. Aiming at the traffic organization mode of satellite island roundabout, the paper analyzes the running route of left turn and turn around vehicles by using the traffic flow analysis technology. The results show that the satellite island roundabout can greatly improve the traffic capacity of the intersection, especially for the left turn and turn the intersection of large traffic flow, providing a new choice for modern plane cross design.