信号控制交叉口物理渠化对通行能力的影响

城市道路平面交叉口是城市交通中的瓶颈,而交叉口的渠化设计是提高交叉口通行能力的重要方法。对在哈尔滨市征仪路—保健路信号交叉口的几何布局、交通运行和控制情况调查数据分析整理的基础上,利用VISSIM仿真软件模拟该交叉口物理渠化前后交通流的运行状况,对比两者在通行能力、交错点、排队长度、车辆延误等指标的变化。研究结果表明：采取物理渠化措施后,通行能力提高了29.9%;有效的缓解右转车辆和回转车辆与其他车流的冲突;降低了右转车道、左转车道和回转车道的排队长度;行车延误下降33.8%,服务水平由D级上升到C级。

Effects of Entity Facilities Channelization on the Capacity of Signalized Control Intersections

Intersection is the bottle-neck of city traffic,while intersection channeling design is the important method of enhancing the capability of intersection. The VISSIM simulation software was used to simulate the operating conditions of the traffic flow before and after entity facilities channelization,and the two cases were compared with the indicators of capacity,staggered points,queue length,vehicle delay,based on the collating of geometric layout,operation and control of traffic in the intersection of Zhengyi Road and Baojian Road in Harbin. The results showed that after taking the entity facilities channelization measures,the traffic capacity was improved by 29. 9%,the conflict of right-turning vehicles and turning vehicles with other traffic flow was relieved effectively,the queue length of right-turn lane,left-turn lanes and turning lane was reduced,the traffic delays was decreased by 33. 8%,and service level was elevated from D-level to C-level.