基于VISSIM仿真的城市信号交叉口交通组织优化研究

发布时间：2018-11-09 20:57

【摘要】：信号交叉口是城市道路网中的重要节点,是各类交通流汇集、转向和通过的必经之地。随着城市的快速发展和车辆保有量的增大,加之道路渠化和信号配时不尽合理,使信号交叉口经常发生交通拥挤、堵塞或交通事故,交通高峰时段更甚,不仅降低了交叉口的通行能力,同时加剧了环境污染及能源的消耗。因此,为解决城市信号交叉口具体交通问题,对其进行科学、合理的优化研究迫在眉睫。首先,本文从我国混合交通流的特点出发,通过对交叉口混合交通流冲突的分析,提出了时间分离、空间分离两种方法,以减少冲突点;以交通组织为基础,分析研究了渠化交通的作用、设计流程以及信号配时的两种计算方法,为信号交叉口的优化提供理论依据。其次,本文以西安市太乙路-友谊东路信号交叉口为具体实例,对现场道路几何条件、交叉口信号相位及配时方案和交通流量进行了调查;从道路渠化、信号控制、交通流冲突等方面分析了该交叉口存在的交通问题,针对这些问题,分别提出了渠化交通优化方案和信号控制优化方案,并将其结合起来,根据不同的信号配时,提出了两种交通组织优化方案。最后,本文使用常用的交通仿真软件VISSIM(Vision Traffic Simulation),对该信号交叉口的现有交通组织方案及两种优化方案进行模型建立以及仿真运行,并使用三大类四种评价指标(排队时间、行程时间、延误、排队长度)对各方案进行评价,以表格形式表示出了各方案的评价指标的数值,以图形形式直观地给出各方案的评价结果,通过对比分析,选取出最佳交通组织优化方案,有效地改善该信号交叉口的交通现状。
[Abstract]:The signalized intersection is an important node in the urban road network. It is the necessary place for all kinds of traffic flow to converge, turn and pass through. With the rapid development of the city and the increase of the number of vehicles, the traffic congestion, congestion or traffic accidents often occur at signalized intersections, especially during rush hours. It not only reduces the capacity of intersection, but also intensifies environmental pollution and energy consumption. Therefore, in order to solve the specific traffic problems of urban signalized intersections, it is urgent to study them scientifically and rationally. Firstly, according to the characteristics of the mixed traffic flow in China, this paper analyzes the conflict of the mixed traffic flow at the intersection, and puts forward two methods: time separation and space separation to reduce the conflict point. On the basis of traffic organization, this paper analyzes and studies the function of channelized traffic, the design process and two calculation methods of signal timing, which provides theoretical basis for the optimization of signalized intersections. Secondly, taking the signal intersection of Taiyi Road and East Friendship Road in Xi'an as a concrete example, this paper investigates the road geometric condition, the signal phase, the timing scheme and the traffic flow of the intersection. The traffic problems at the intersection are analyzed from the aspects of road channelization, signal control, traffic flow conflict and so on. Aiming at these problems, the traffic optimization scheme and signal control optimization scheme are put forward and combined. According to different signal timing, two traffic organization optimization schemes are proposed. Finally, the traffic simulation software VISSIM (Vision Traffic Simulation), is used to model and simulate the existing traffic organization and two optimization schemes of the signalized intersection, and three kinds of four evaluation indexes (queue time) are used. Travel time, delay, queue length) to evaluate each scheme, to express the evaluation index value of each scheme in the form of table, to give the evaluation results of each scheme intuitively in the form of graph, and to compare and analyze the results of each scheme. The optimal traffic organization optimization scheme is selected to effectively improve the traffic situation at the signalized intersection.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491

【共引文献】