关键词: 交通工程, 远引掉头, 延误, 交通仿真, 交叉口

Abstract: Considering the phenomenon that T-type intersections traffic flow is greatly influenced by the left-turning vehicles, the traffic organization method that left-turning traffic flow of main road adopts U-turn at intersections was proposed to improve the traffic efficiency and driving safety. The applicable conditions and traffic organization method of T-type plane intersections far-leading of left-turning vehicles were analyzed. The relation model between lane volume and operating range of lanes changing was established. The location calculation model about U-turn of far-leading left-turning was constructed by taking minimum average delay of vehicles at intersections as the evaluation index, and the effect of adjacent intersections functional area was also considered. The model covered some parameters of intersections, such as geometric dimensioning and traffic flow. In addition, the delay calculation method of T-type intersections after far-leading and channelization was dissected. The example shows that, under certain conditions, the far-leading of left-turning at T-type intersections can effectively reduce the number of signal phase and average vehicle delay. The feasibility of the above method is verified by traffic simulation.

Key words: traffic engineering, U-turn followed by right-turn；delay；traffic simulation；intersection