下游交叉口设置对快速路出口通行能力的影响  

Influence of the downstream intersection setting on expressway exit capacity

作　　者：张洪宾[1] 孙光辉 李晴晴 ZHANG Hongbin;SUN Guanghui;LI Qingqing(School of Transportation and Vehicle Engineering,Shandong University of Technology,Zibo 255049,China)

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《山东理工大学学报（自然科学版）》2023年第6期52-55,68,共5页Journal of Shandong University of Technology:Natural Science Edition

基　　金：山东省自然科学基金项目(ZR2018BF024)。

摘　　要：为缓解下游交叉口设置造成快速路出口不畅、特别是下游交叉口进口排队车辆易上溢堵塞快速路出口问题,在考虑快速路辅路流量基础上,利用间隙接受理论,建立快速路出口通行能力计算模型;通过分析辅路流量、信号周期、绿信比、交叉口进口道通行能力及进口道排队车辆传播速度5个参数,提出快速路下游交叉口进口道排队长度模型;通过分析不同变量对交叉口进口车辆排队长度的影响,提出快速路出口与下游交叉口的优化设计方案。结果表明:随着辅路流量增加,快速路出口通行能力呈缓慢下降趋势;随着交叉口辅路方向绿信比增加,排队长度快速变短;出口与下游交叉口可采用外侧式匝道设计,优化辅路进口方向绿信比,可有效避免快速路出口堵塞。It is necessary to alleviate the problem that the exit of the expressway is not smooth due to the downstream intersection setting,especially the problem that the vehicles queuing at the downstream intersection entrance is prone to overflowing and blocking the expressway exit.The expressway exit capacity calculation model is established by the gap acceptance theory and considering the auxiliary road flow of expressway.A spacing model of the vehicle queue length at the downstream intersection is proposed by analyzing five parameters including auxiliary flow,signal cycle,green signal ratio,entrance capacity of intersection and speed of queue vehicles.The influence of different variables on the vehicle queue length at the intersection are analyzed.The optimal design programme of expressway exit and downstream intersection is put forward.The results show that the exit capacity of the expressway declines slowly when the traffic volume of the auxiliary road increases.The queue length quickly becomes shorter with the increase of the green signal ratio in the direction of the auxiliary road at the intersection.It can effectively avoid the blockage of the expressway exit by using external ramp at the exit and downstream intersections and optimizing the green signal ratio of the entrance direction of the auxiliary road.

关 键 词：快速路出口 通行能力 交叉口 绿信比 流量比 

分 类 号：U491[交通运输工程—交通运输规划与管理]