基于多相位变相序的单交叉口信号配时优化研究

发布时间：2019-07-09 08:34

【摘要】：随着我国经济的飞速发展以及城镇化和汽车普及进程的加快，各种规模城市的交通拥堵现象不断加剧，由此产生的环境污染和交通事故频发等问题严重影响了公众出行服务水平，甚至危及到人民的生命财产安全。这使得城市交通问题成为复杂而棘手的社会问题。单交叉口是构成城市交通网络的重要节点，单交叉口信号配时是交通控制的关键因素。本论文提出多相位可变相序基础上的信号配时优化方法，以减少交通冲突，确保居民出行安全，减少车辆对环境的危害，有效预防交通拥堵并提高交叉口车辆通行率。首先，根据交叉口信号控制理论，确定交通信号的控制方式及参数，并对单交叉口各交通流间的关系、信号组间关系进行定义。其次，根据交叉口相位相序设计的影响因素及设计原则，，对单交叉口相位相序进行设计。根据交叉口的各进口道交通流量是否均衡，把相位的设计分为带搭接车流和不带搭接车流的多相位设计。针对两种不同类型的车流模型，在考虑相位数、相位组合、初始相序安排的情况下，建立基于损失时间最少的相序优化模型，并利用遗传算法对相序优化模型求解。再次，在单交叉口信号配时优化研究中，以几种典型的信号配时方法为基础，建立了以总延误最小，通行能力最大和停车次数最少为目标的单交叉口信号配时优化模型，并利用拉格朗日乘数法对模型求解。同时提出了一种可变相序的多相位感应信号配时优化方法，并提出算法的具体步骤。最后，以北京市石景山区晋元庄路与杨庄东街丁字交叉口为例，对其进行信号配时设计，通过多相位变相序的配时优化，提高了交叉口的通行能力，减少了车辆的总延误及停车次数。
文内图片：

图片说明：十字交叉口示意图
[Abstract]:With the rapid development of economy and the acceleration of urbanization and automobile popularization in China, the traffic congestion in cities of all sizes is becoming more and more serious. The resulting environmental pollution and frequent traffic accidents have seriously affected the level of public travel service, and even endangered the safety of people's lives and property. This makes the urban traffic problem become a complex and thorny social problem. Single intersection is an important node of urban traffic network, and signal timing of single intersection is the key factor of traffic control. In this paper, a signal timing optimization method based on multi-phase variable phase sequence is proposed to reduce traffic conflict, ensure residents' travel safety, reduce the harm of vehicles to the environment, effectively prevent traffic congestion and improve the traffic rate at intersections. Firstly, according to the signal control theory of intersection, the control mode and parameters of traffic signal are determined, and the relationship between traffic flow and signal group at a single intersection is defined. Secondly, according to the influencing factors and design principles of intersection phase sequence design, the phase sequence of single intersection is designed. According to whether the traffic flow of each entrance road at the intersection is balanced or not, the phase design is divided into multi-phase design with and without lap traffic flow. For two different types of traffic flow models, the phase sequence optimization model based on the least loss time is established under the consideration of phase number, phase combination and initial phase sequence arrangement, and the phase sequence optimization model is solved by genetic algorithm. Thirdly, in the research of signal timing optimization of single intersection, based on several typical signal timing methods, a signal timing optimization model of single intersection with the goal of minimum total delay, maximum traffic capacity and minimum parking times is established, and the Lagrangian multiplier method is used to solve the model. At the same time, a multi-phase induction signal timing optimization method with variable phase sequence is proposed, and the concrete steps of the algorithm are put forward. Finally, taking the intersection of Jinyuanzhuang Road and Yangzhuang East Street in Shijingshan District of Beijing as an example, the signal timing design is carried out. through the optimization of multi-phase sequence timing, the traffic capacity of the intersection is improved and the total delay and parking times of the vehicle are reduced.
【学位授予单位】：兰州交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.54

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