城市禁左干线信号协调优化控制研究

发布时间：2018-04-21 20:31

本文选题：禁左干线 + 协调控制　；参考：《江苏大学》2017年硕士论文

【摘要】：随着我国经济的快速发展,汽车保有量激增,城市道路的交通负荷与日俱增,这给人们日常出行安全带来了隐患且严重影响人们的日常生活。交叉口是城市交通的集散点,往往是发生交通拥堵主要环节,其中左转交通流又是造成交叉口拥堵的重要原因。由于交通基础设施的增建率无法与机动车保有量的增长率相匹配,禁左措施引起人们的关注。目前对禁左措施的研究并没有考虑禁左后绕行车辆对整个交通系统的影响,本文提出一种单独针对禁左干线设计的协调优化控制方式。该方式是在总结禁左交叉口特点和最小延误法的基础上,以优化相位差、周期以及绿信比为最终目的的禁左干线信号协调控制方式。分析左转交通流特性和其对交叉口交通组织的影响,在此基础上论述了交叉口实施禁左措施的优缺点以及实施方式和条件。介绍干线信号协调控制的基本概念,分析国内外现有的信号协调控制方式方法以及影响禁左干线协调控制效果的影响因素。基于对现状的研究,发现目前对禁左措施的研究范围仅限于单个交叉口,在干线协调控制方面大多数控制方法也局限于给定车速、固定周期和绿灯时长,仅对相位差等条件下对干线进行协调优化。在基于干线叠加思想的基础上,考虑车速随机性以及禁左后绕行车辆对干线的影响,以禁左干线直行车辆及绕行车辆的总延误和总停车次数为目标函数,构建一个适用于禁左干线信号控制的协调优化模型。基于一个由三个禁左交叉口和绕行路线组成的简单禁左干线系统,利用MATLAB设计改进遗传算法程序语言对搭建模型求解,并基于VISSIM仿真平台对模型优化结果进行仿真分析。然后再将仿真数据与以往干线信号协调控制所得平均延误和平均停车次数对比分析,干线中车辆平均延误下降2.6s/pcu、排队长度下降了2.7pcu,显示了本文所提出模型的优越性。在此基础上对常州市金坛区东门大街部分交叉口组成的干线进行实例分析,经验证发现本文模型优化的禁左干线在五个周期内的车辆平均延误和平均停车次数均有所下降,验证模型的实用性。
[Abstract]:With the rapid development of our country's economy, the number of cars is increasing rapidly, and the traffic load of urban roads is increasing day by day, which brings hidden trouble to people's daily travel safety and seriously affects people's daily life. Intersection is the distribution point of urban traffic, which is often the main link of traffic congestion, among which the left-turn traffic flow is an important cause of traffic congestion at intersections. Because the construction rate of traffic infrastructure can not match the growth rate of vehicle ownership, the measures of banning left-left traffic have attracted people's attention. At present, the research on the measures to ban left left does not consider the influence of the left rear bypass vehicle on the whole traffic system. In this paper, a coordinated and optimized control method for the design of the forbidden left trunk line is proposed in this paper. On the basis of summing up the characteristics of forbidden left intersection and the method of minimum delay, this method is based on the optimization of phase difference, period and green signal ratio for the final purpose of the coordinated control of the signal of the forbidden left trunk line. The characteristics of left-turn traffic flow and its influence on traffic organization at intersections are analyzed. On the basis of this, the advantages and disadvantages of the measures to ban left traffic at intersections are discussed, as well as the ways and conditions of implementation. This paper introduces the basic concept of coordinated control of trunk line signals, analyzes the existing methods of signal coordination control at home and abroad and the influencing factors affecting the effect of coordinated control of forbidden left trunk lines. Based on the study of the present situation, it is found that the research scope of the measures to ban the left is limited to a single intersection, and most of the control methods for the coordinated control of the trunk line are limited to the given speed, fixed period and green time. The coordinated optimization of the trunk line is carried out only under the condition of phase difference and so on. Based on the idea of trunk line superposition, considering the randomness of speed and the influence of the left rear bypass vehicle on the trunk line, taking the total delay and the total stop number of the forbidden left trunk line direct vehicle and the bypass vehicle as the objective function, A coordinated optimization model for signal control of forbidden left trunk line is constructed. Based on a simple left-forbidden trunk line system composed of three forbidden left intersections and a bypass route, the model is solved by using MATLAB design and improved genetic algorithm programming language, and the model optimization results are simulated and analyzed based on the VISSIM simulation platform. Then the simulation data are compared with the average delay and the average stop times of the previous trunk signal coordination control. The average vehicle delay decreases by 2.6 s / pcus and the queue length decreases by 2.7 pcu. which shows the superiority of the model proposed in this paper. On this basis, an example analysis of the trunk line formed at the intersection of Dongmen Street in Jintan District of Changzhou City is carried out. It is found that the average vehicle delay and the average parking times of the forbidden left trunk line optimized by this model in five cycles have decreased. The practicability of the model is verified.
【学位授予单位】：江苏大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.54

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