连续流交叉口左转非机动车交通组织创新设计

In order to resolve the conflict between left-turn non-motor vehicles and straight-going motor vehicles at continuous flow intersections, an innovative design scheme is proposed for the left-turn non-motor vehicles crossing streets. Considering the conventional design and the two-step street crossing scheme, the three schemes were integrated into a unified optimization model. Taking the maximum vehicle throughput at the intersection as the optimization objective, a mixed-integer nonlinear programming optimization model was established, which was transformed into a nonlinear model. And the operational benefits of the three schemes were verified through VISSIM simulation. The result indicates the two-step street crossing scheme and the innovative design scheme can improve the traffic capacity of vehicles at intersections. The improvement can be more significant in high-flow scenarios, which reduce the vehicle delay by 55.58% and 57.18%, respectively. The conventional design is not suitable for the scene with the large straight-going motor flow, while the two-step street crossing scheme and the innovative design are not suitable for the scene with large left-turn motor vehicle flow. The increase of left-turn non-motor vehicle flow in the two-step street crossing scheme and the conventional design will lead to a rapid decline of the vehicle capacity. The innovative design is less affected by the left-turn non-motor vehicle flow and it has good applicability in various traffic scenarios.