连 续 流 交 叉 口 几 何 设 计 与 信 号 配 时 协 同 优 化

In order to ensure that the application of continuous flow intersections meets practical needs through selecting the shift left-turn design in 1 to 4 directions at the intersection, combined with whether to adopt right-turn lanes, conventional right-turn exit lanes, conventional exit lanes and other micro-improvement styles, this work proposed the coordinated optimization of geometric design and signal timing at continuous flow intersections based on the extended 2401 design schemes. Considering constraints of lane division, main signal control, pre-signal control, main and pre-signal coordination, and flow distribution, a mixed integer linear programming model was constructed. The results showed that the capacity of single-lane, asymmetric two-lane, symmetrical two-lane, three-lane and four-way shifted left turn settings increased by about 5%, 10%, 25%, 35% and 50% compared with that of conventional intersections. The capacity of continuous intersections increased significantly with the increase of sections with shifted left turn lanes. The optimal application scenario of four-way setting is the intersection where the road flow of each section is not very different. The application scenario of three-way setting is closely related to the traffic composition. The symmetrical two-way setting is suitable for the symmetrical traffic scenario and the shifted left turn lane is generally set on the main road with large traffic volume. The asymmetrical two-way setting performs better in the asymmetrical two-way traffic scenario, and the single-way setting is not recommended.