摘要
针对当前城市快速路普遍存在的出口匝道控制问题,采用VISSIM仿真软件,根据城市快速路的出口匝道交通特性,对软件的交通模型参数进行标定,运用二分法及控制变量法获得匝道出现停车的交通量临界值,确定基于出口匝道交通情况的辅路交通量和主路交通量综合分区图.在此条件下,选取辅路延误和主路延误为评价指标,以福州市南二环快速路首山出入口交通控制为研究对象,针对分区图的不同阶段,分别进行辅路车辆让行主路车辆控制、出口辅路感应控制、现状仿真研究,结果表明:畅行阶段采用不控制方式,缓行及拥堵级别Ⅱ阶段采用出口辅路感应控制方式,拥堵级别较高阶段采用辅路车辆让行主路车辆或关闭出口匝道方式.
In view of the current control problems of off-ramp on urban expressway, traffic simulation software VISSIM is applied. According to the traffic characteristics of the off-ramp to expressway, the parameters of traffic model are categorized. Then this paper uses dichotomy and control variables to obtain the thresholds as vehicles start queuing at exit ramps, and draws a comprehensive zoning map based on the side roads and the main road traffic flow. By selecting delay of main and side road as accessing indices, taking the traffic control mode of the Shoushan entrance of South Second Ring Expressway in Fuzhou as an example, on account of the different stages of the comprehensive zoning map, a few following simulation analyses were performed： the vehicles on the main lanes have priority; simulation of off-ramp metering signal; existing condition simulation. The simulation results show that optimal control methods, which use no metering.
出处
《道路交通与安全》
2015年第4期8-14,共7页
Road Traffic & Safety
基金
福建省交通运输厅2012年科技研究项目
编号201229
