环形交叉口参与下的交叉口群划分方法及协调控制研究

发布时间：2018-03-10 12:08

本文选题：交通工程　切入点：环形交叉口　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国城市人口的不断增加,城市内机动车保有量也在持续增加,导致了城市交通拥堵问题的加剧,而环形交叉口交通拥堵所带来的车辆延误增加、交通秩序混乱、交通事故频发已经逐渐变为常态化问题。因而,如何采取有效措施来缓解环形交叉口交通拥堵现象已经成为当今交通控制研究的热点问题。论文首先对交叉口群的概念及特征进行了界定与介绍,解析了交叉口群信号协调控制的基本参数(公共周期、绿信比、有效绿灯时间、相位差、排队率以及关联度)以及交叉口群信号协调控制的性能指标(车辆平均停车次数、车辆平均延误以及平均排队长度),并剖析了环形交叉口参与下的交叉口群存在的问题。其次,解析了交叉口群划分内涵及常见划分类型,分别基于干道优先、短连线优先、环形交叉口优先原则提出了干道协调控制的交叉口群划分方法,对控制区域进行初步划分;在此基础上进行瓶颈区识别,相邻交叉口关联度对计算,并提出了基于相邻交叉口关联度的交叉口群划分方法,对交叉口群区域进行进一步划分。然后,从虚拟信号控制理念出发,提出了基于虚拟信号控制的交叉口群协调控制策略;通过选取关联指标、计算路径关联度,确定了虚拟信号控制下的交叉口群协调控制路径;基于干道绿波协调控制原理,通过确定公共周期与绿信比、计算行程及延误时间、优化绿信比和主相位绿灯时间,建立了环形交叉口参与下的交叉口群相位差模型。最后,应用VISSIM微观交通仿真软件,以云南省曲靖市珠江源大道与建宁东、西路所组成的道路网为例,以平均停车次数、平均延误时间及平均排队长度作为评价指标,分别以交叉口群划分方式以及虚拟信号控制环形交叉口作为变量,模拟不同环境下的交叉口群运行状态并与实际情况进行对比,结果表明:利用相邻交叉口关联度对交叉口群划分效果优于干道协调控制的交叉口群划分,且两种划分方式下的车辆平均延误时间以及车辆平均停车次数分别较现状条件降低了12.8%、21.4%以及12.1%、19.6%;虚拟信号控制状态下交叉口群运行效益优于现状控制,所有车辆平均延误时间从29.19秒降低至22.93秒,降低了 21.4%,此外,平均排队长度从30.64米降低至25.94米,降低了 15.3%。
[Abstract]:With the continuous increase of urban population in China, the number of motor vehicles in cities is also increasing, which leads to the aggravation of urban traffic congestion, and the increase of vehicle delay and traffic order caused by traffic congestion at roundabout intersection. The frequency of traffic accidents has gradually become a regular problem. How to take effective measures to alleviate traffic congestion at roundabout has become a hot issue in traffic control nowadays. Firstly, the concept and characteristics of intersection group are defined and introduced in this paper. The basic parameters (common period, green signal ratio, effective green light time, phase difference, queue rate and correlation degree) of the signal coordination control of intersection group and the performance index of the signal coordination control of intersection group (vehicle average stop times) are analyzed. The average vehicle delay and the average queue length are analyzed, and the existing problems of intersection group with the participation of circular intersection are analyzed. Secondly, the connotation and common partition types of intersection group are analyzed, which are based on the priority of trunk road and the priority of short connection, respectively. In this paper, the priority principle of circular intersection is put forward, and the method of division of intersection group is put forward, and the control area is preliminarily divided, on the basis of which the bottleneck area is identified, and the correlation degree of adjacent intersection is calculated. The method of intersection group division based on the correlation degree of adjacent intersection is put forward, and the area of intersection group is further divided. Then, based on the concept of virtual signal control, the coordinated control strategy of intersection group based on virtual signal control is proposed. By selecting the correlation index and calculating the path correlation degree, the coordinated control path of intersection group under virtual signal control is determined. Based on the principle of coordinated control of green wave in trunk road, the travel schedule and delay time are calculated by determining the ratio of public cycle to green signal. The phase difference model of intersection group with the participation of circular intersection is established by optimizing the green signal ratio and the main phase green time. Finally, using the VISSIM microcosmic traffic simulation software, the Zhujiang River Source Avenue and Jianning East of Qujing City, Yunnan Province are used. Taking the average parking times, average delay time and the average queue length as the evaluation indexes, the road network composed of the west road as an example, the way of dividing the intersection groups and the virtual signal-controlled circular intersection are taken as the variables, respectively. The operation state of intersection group in different environments is simulated and compared with the actual situation. The results show that the effect of using adjacent intersection correlation degree to divide intersection group is better than that of intersection group division with coordinated control of trunk road. In addition, the average delay time and the average parking times of the vehicles were decreased by 12.8% and 19.6%, respectively, compared with the current conditions, and the operation benefits of the intersections under the virtual signal control state were better than that of the current situation control, and the average vehicle delay time and the average parking times of the vehicles were decreased by 12.8% and 19.6%, respectively. The average delay time for all vehicles was reduced by 21.4m from 29.19 seconds to 22.93 seconds, and the average queue length was reduced by 15.3m from 30.64 meters to 25.94 meters.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.23

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