城市道路T形交叉口斜行斑马线设计研究

Study on the Diagonal Zebra Crossing in the T-shaped Intersection of Urban Road

针对左转机动车流量大、行人斜向过街需求高的T形交叉口,结合交叉口车流、行人流的交通特性,提出了一种左转机动车和斜向行人协同过街的思路,在交叉口内设置斜行斑马线和Z字形人行横道,以降低交叉口整体延误及人-机冲突;并建立了基于人-机冲突的交叉口平均延误模型,该模型能实现交叉口交通冲突、交通延误的合理计算;最后,选取武汉市一个典型的T形交叉口对该方法进行了验证,利用所建模型和VISSIM仿真两种方法进行验证,结果表明,改善后的平均延误降低了34.6%.

When the T-shaped intersection having many left-turning vehicles and large demand of diago-nal pedestrians, combined with the traffic characteristics of the vehicles and pedestrians ,a left-turning vehicles is presented and the design method of diagonal pedestrians crossing the street together, and set diagonal lines of a zebra crossing and ＂Z＂ type pavement in the intersection. Comprehensive consid-ering the traffic conflicts and traffic delays , the average delay model of pedestrian-vehicle conflict ,is established it puts pedestrian and vehicle as a whole to consider, which can directly reflect the degree of con-flict; Finally, selecting a typical T intersection in Wuhan city for example, through the model and VISSIM simulation verification, the results show that the improved average delay was reduced by 34.6%.