文章编号： 1672-5328（2020）02-0110-08

苏镜荣1，唐翀1，程德勇2
(1. 深圳市城市交通规划设计研究中心有限公司云南分院，云南昆明650011；2. 昆明市规划设计研究院，云南 昆明650011)

摘要： 单向交通是解决城市交通拥堵问题最有效和可行的措施之一。有必要对单向二分路的通行能 力和延误进行定量分析，客观评估单向二分路的实施效果和应用前景。引入等效交叉口概念，采用 美国《道路通行能力手册》(HCM2010)的方法，分别对双向4 车道、6 车道和8 车道三种不同等级的 传统干路交叉口与采用单向二分路后等效交叉口进行对比，并通过VISSIM软件进行仿真验证。结 果表明：传统干路采用单向二分路后，等效交叉口的通行能力提高约31%~40%；当传统干路交叉 口饱和度小于0.8 时，等效交叉口的延误可减少42%~62%；当传统干路交叉口饱和度大于0.8 时， 等效交叉口的延误减少效果将更加明显。通过仿真对延误计算结果进行验证，误差不超过10%，说 明计算结果可靠有效。以双向6 车道传统干路交叉口为例，仿真显示采用单向二分路后等效交叉口 的尾气排放量(CO，NOX，VOC)和燃油消耗量下降规律相同，均下降45%~59%。因此，单向二分 路具有明显的优势和应用价值。

关键词： 干路；单向二分路；通行能力；延误

中图分类号： U491.1+2

文献标识码：A

Road Capacity and Traffic Delay at Signalized Intersection on Traditional Arterial Road and One- Way Couplet Road

Su Jingrong1, Tang Chong1, Cheng Deyong2
(1.Shenzhen Urban Transport Planning Center Co., Ltd., Kunming Yunnan 650011, China; 2.Kunming Planning Design & Research Institute, Kunming Yunnan 650011, China)

Abstract： One-way traffic is one of the most effective and feasible measures to relieve urban traffic congestion. It is necessary to carry out quantitative analysis on capacity and delay of the one-way couplet road and objectively evaluate the performance and application prospect of one-way couplet road. Based on the concept of equivalent intersection and Highway Capacity Manual (HCM2010), this paper compares the performance of three different types of intersections, namely, two-way four-lanes, six-lanes and eight-lanes intersections after using one-way couplet road. The results of simulation by VISSIM show that the capacity of the equivalent intersection increases by 31%-40% on one-way couplet road compared to traditional arterial road. When the saturation of traditional arterial road intersection is less than 0.8, the delay of the equivalent intersection can be reduced by 42%-62%, while the saturation is greater than 0.8, the delay reduction will be more obvious. The delay simulation results show that the calculation results are reliable and effective while the error is within 10%. Taking the six-lanes traditional arterial road intersection as an example, the simulation results show that the exhaust emissions (CO, NOX, VOC） and fuel consumption at the equivalent intersection have the same decreasing after the one-way couplet road is adopted, both of which reduced by 45%-59%. Therefore, one-way couplet road has obvious advantages and application value.

Keywords： arterial road; one-way couplet road; capacity; delay