关键词: 交通工程, 控制策略, 优化模型, 平行流交叉口, 移位左转, 非常规交叉口

Abstract:

In order to solve the stopping problem of left- turning traffic at parallel flow interactions, this paper first proposes design schemes for the interactions to allow the left-turn, straight-going, and right-turn traffic flow in the one signal phase with all the traffic vehicles stopping at most one time. Two types of design schemes are proposed and compared with the existing design scheme. The parallel flow interaction with left-turn lanes placed on the right is focused on. Based on the characteristics of traffic flow, an optimization model is then constructed and some constraints are designed to avoid secondary stopping and conflicts of vehicles. The performance of the model is evaluated. The results show that compared with the traditional intersection control, the intersection capacity is increased by more than 60%, and the vehicle delay is reduced by about 70%. The proposed control strategy can eliminate the conflicts of left-turn and straight-going traffic and improve the intersection capacity of intersections without sacrificing the benefits of vehicles. This control strategy provides a new perspective for the study on parallel flow intersections.

Key words: traffic engineering, control strategy, optimization model, parallel flow intersection, displaced leftturn, unconventional arterial intersection design