基于图论的偶发性交通拥堵区域动态划分及子区控制策略研究

发布时间：2018-07-02 20:55

本文选题：偶发性拥堵 + 交通流演化　；参考：《长沙理工大学》2015年硕士论文

【摘要】：一方面机动车的持有量随着人口的增加也大幅上升,而另一方面城市交通设施并未随之提高完善。因此,加剧了城市交通供需之间的矛盾,交通拥堵已成为城市主要问题之一。除了人们常见的高峰期拥堵外,城市道路网中的一些交通事件易造成偶发性交通拥堵。偶发性交通拥堵发生的地点、时间具有随机性,其疏散控制比较复杂,一方面,由于交通拥堵控制发生的地点随机性,其相邻交叉口和路段的通行能力、交通流特性是不同的,第二,由于发生拥堵的时间具有随机性,不同时段交通流也具有不同的特性,针对常态交通流的优化控制方案此时不适用于疏散控制。因此,偶发性交通拥堵的疏散控制首先要解决的问题就是控制区域如何划分,通常控制区域动态划分是将关联程度较大相邻交叉口合并成一个控制区域,不同的控制区域采用不同的控制策略。基于此,本文着眼于偶发性局部拥堵区域的疏散控制策略,在既有的研究成果基础上,主要做了以下几个方面的工作：(1)本文总结了国内外拥堵区域的动态划分方法以及偶发性拥堵区域疏散控制策略方面的研究现状,概述了偶发性交通拥堵区域动态划分的基础知识,对偶发性拥堵区域动态划分的静态道路参数、动态交通流参数、信号控制参数以及动态划分参数进行了详细的分析。(2)偶发性交通拥堵具有随机性,从交通事件发生导致交通拥堵直到拥堵完全消散,这一过程中拥堵区的范围是不断变化的。本文利用实时交通流密度参数,应用图论相关理论和Kruskal算法,分析交通流阻塞区、过渡区和常态区的动态演化过程,为城市道路偶发性拥堵控制策略选取提供依据。利用MATLAB的数值仿真,比较分析其方法可行。(3)从交通信号控制和交通禁行两方面制定疏散控制策略,以快速疏散拥堵区域车流、缓解交通压力为目标,以协调信号控制和车辆禁行为手段,针对阻塞区、过渡区与常态区三个控制子区的特点,制定疏散控制方案。
[Abstract]:On the one hand, the number of motor vehicles has increased with the increase of population, and on the other hand, urban traffic facilities have not been improved. Therefore, the contradiction between supply and demand of urban traffic has been aggravated. Traffic congestion has become one of the main problems in the city. It is easy to cause occasional traffic congestion. The location of occasional traffic congestion is random, and its evacuation control is more complex. On the one hand, the traffic flow characteristics of adjacent intersection and section are different because of the randomness of traffic congestion control, and the traffic flow characteristics are different, second, because the time of congestion is random. Traffic flow in different periods also has different characteristics. The optimal control scheme for normal traffic flow is not suitable for evacuation control at this time. Therefore, the first problem to be solved in the evacuation control of occasional traffic congestion is how to divide the control area. A control area, different control areas use different control strategies. Based on this, this paper focuses on the evacuation control strategy in the occasional local congestion area, and on the basis of the existing research results, the main work is done in the following aspects: (1) this paper summarizes the dynamic division method and the occasional congestion in the congestion area at home and abroad. The research status of regional evacuation control strategy is presented, and the basic knowledge of dynamic partition of occasional traffic congestion area is summarized. The static road parameters, dynamic traffic flow parameters, signal control parameters and dynamic partition parameters are analyzed in detail. (2) random traffic congestion is found. In this process, the scope of congestion area is constantly changing from traffic congestion to congestion. In this process, the scope of congestion zone is constantly changing. In this paper, the dynamic evolution process of traffic congestion, transition zone and normal area is analyzed by using the real-time traffic flow density parameters and the theory of graph theory and Kruskal algorithm. By using MATLAB numerical simulation, the method is compared and analyzed. (3) the evacuation control strategy is formulated from two aspects of traffic signal control and traffic prohibition, in order to quickly evacuate the traffic flow and alleviate traffic pressure, and to coordinate signal control and vehicle prohibition behavior, aiming at blocking area, transition zone and normal state. The characteristics of the three control zones are formulated, and evacuation control plans are formulated.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491.265

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