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采用理论分析结合Vissim软件仿真的手段,提出单口放行方法具有采用左转直行自适应车道、适合不对称交通流、容易变道以及简单易操作的4个优点。分析了该方法在左转非机动车与直行机动车相冲突和相位损失方面的缺陷,计算了延误,并总结了单口放行方法的适用性条件。最后,以株洲市某路口为例,对比分析了采用传统的4相位和单口放行两种方法设计时交叉口的各项评价指标。研究表明,设计恰当的单口放行配时方法能大大减少交叉口的延误,提高路网里车辆的行程车速和总行程时间。
By means of theoretical analysis combined with Vissim software simulation, this paper puts forward that the single port clearance method has the advantages of adopting left turn straight adaptive lane, suitable for asymmetric traffic flow, easy lane change and simple and easy operation. The defects of the method in terms of the conflict and phase loss between the left-turn non-motor vehicle and the direct vehicle are analyzed. The delay is calculated and the applicability of the single-port release method is summarized. Finally, taking a juncture in Zhuzhou City as an example, this paper compares and evaluates various evaluation indexes at the time of design using two methods of traditional 4-phase and single-port release. The research shows that the proper design of single-port release timing can greatly reduce the delay of intersections and increase the travel speed and total travel time of the vehicles in the road network.