关键词: 交通工程；礼让行人；右转保护型相位；可穿越间隙理论；设置阈值

Abstract: In order to scientifically set the right-turn protective phase of signalized intersection under the detailed rules of comity to pedestrians, the spatial and temporal distribution characteristics of pedestrian-vehicle interaction and two-way pedestrian crossing street were analyzed by the field investigation of several intersections in Beijing. Based on the acceptable gap theory, a delay model of pedestrian-vehicle interaction under the influence of yielding rate and two-way pedestrian crossing street was established. The sensitivity analysis of the parameters in the proposed model was carried out, and the conditions for setting right-turn protective phase were proposed from the perspective of safety and operating efficiency. The results show that when the right-turn vehicle flow is not saturated, the right-turn vehicle flow reaches 100 veh/h, and the two-way pedestrian crossing street flow reaches more than 1700 ped/h, it is appropriate to set the right-turn protective phase. The more pedestrian flow crossing the street, the lower the demand of setting threshold value of right-turn protective phase on vehicle flow. With the increase of vehicle flow, the demand of setting threshold value of right-turn protective phase on pedestrian flow tends to decrease firstly and then increase. The higher vehicle yielding rate, the lower the demand of setting threshold value of right-turn protective phase on flow and the smaller the delay increment after setting right-turn protective phase.

Key words: traffic engineering; comity to pedestrians; right-turn protective phase; traversable gap theory; setting threshold