基于VISSIM的远引调头组织效果研究

Study on organizational effect of far lead U-turn based on VISSIM

远引调头通常是在交叉口的支路进口道禁止车辆直接左转以实现交通指引的一种组织方式,目的指引左转车流在禁左路口右转到下游允许调头的中央分隔带开口处调头,间接实现左转的交通组织方法.分别对车辆远引到下游中央路段开口调头及车辆远引到下游信号交叉口调头的交通组织方式进行分析研究,基于VISSIM对直接左转和远引调头这两种典型的组织方式进行实例分析,结果表明远引调头的组织方式具有良好的交通效果,对交通组织工作有较高的实践指导意义.

The far lead U-turn was usually a kind of organization in which vehicles were forbidden to directly turn left at the branch entrance of the intersection to guide the traffic.The purpose was to guide the left turn traffic to turn right at the left-turn forbidden intersection and make a U-turn at the opening section of the central divider downstream where it was possible,which indirectly realized the traffic organization of left turn indeed.This paper explained the significance of the study,and analyzed the traffic organization mode of the left-turn vehicle being led to turn around in the opening section of downstream central divider and the downstream signalized intersection respectively.Finally,based on VISSIM,case-studies were taken on two typical organization modes of direct left turn and far lead U-turn.The results showed that the organization mode of far lead U-turn had a good traffic effect and an important practical guiding significance for traffic organization.