环形交叉口通行能力与信号控制方法研究

发布时间：2018-04-10 20:10

本文选题：环形交叉口 + 信号控制　；参考：《吉林大学》2014年硕士论文

【摘要】：19世纪出现的环形交叉口具有方便管理、冲突点数量少、交通流行驶连续且比较安全等优点。特别是如果车辆数目较低，那么车头时距服从负指数分布或者移位负指数分布，车流的状态是自由流，环形交叉口这种交通组织方式比较经济、高效，它的通行能力远远高于普通的十字交叉口，在城市道路交通发展史上发挥了重要的作用；近年来，随着我国经济和社会的持续高速发展，城市道路交通需求量不断增加，，没有信号控制环形交叉口的缺点逐渐暴露，作为城市交通重要的“节点”经常发生“锁死”和入口排队过长等现象，为了在空间和时间上充分利用环形交叉口的资源来达到提高整个路网通行能力的目的，一种比较有效的方法是根据环形交叉口的真实状况，探求与实时交通状况比较匹配的信号控制方法，将信号控制与环形交叉口的几何特点有机的结合起来，交通量高峰时利用信号灯控制消除了环形交叉口存在的冲突拥堵问题，同时也保留了平峰时段环形交叉口对交通环境的优化以及对交通状况良好的适应性等优点。首先，介绍环形交叉口的研究背景，分析环形交叉口国内外研究现状，将本文的研究意义和目的确定，从而确立了本文的主要研究内容和整体技术路线。其次，对几种比较常见的环形交叉口通行能力的计算方法进行总结归纳，在交织区通行能力的基础上推导出环形交叉口进口道设计通行能力计算方法，由此得出环形交叉口的控制条件。第三，介绍几种目前比较常用的周期计算方法，由于环形交叉口的特殊性，已有的信号控制不能较好的适应，本文基于环道容量—需求的关系，将ALINEA算法引入环形交叉口进行信号灯协调控制，并对信号周期的动态计算方法进行了论述。最后，对新民广场的交通现状进行分析调查发现，高峰时段经常出现拥堵的现象，现有的设计通行能力已经不能满足其需求，因此对新民广场进行重新渠化、配时，并将配时结果用VISSIM进行了交通仿真，结果表明，如果配时方法合适，不仅能够极大增加环形交叉口的通行能力，而且可以一定程度上适应未来交通需求增加的态势。
[Abstract]:The roundabout in the 19th century has the advantages of convenient management, small number of conflict points, continuous and safe traffic flow, etc.In particular, if the number of vehicles is low, then the head-length distribution or shift negative exponential distribution, the state of the traffic flow is free flow. This traffic organization mode of roundabout is more economical and efficient.Its traffic capacity is far higher than the common intersection, which plays an important role in the history of urban road traffic development. In recent years, with the sustained and rapid development of our economy and society, the demand for urban road traffic has been increasing.The disadvantage of no signal control ring intersection is gradually exposed. As an important "node" of urban traffic, the phenomenon of "locking" and too long queue at the entrance often occurs.In order to make full use of the resources of the circular intersection in space and time to achieve the purpose of improving the capacity of the entire road network, a more effective method is based on the real situation of the ring crossing.The signal control method, which is compared with the real-time traffic condition, combines the signal control with the geometric characteristics of the annular intersection, and eliminates the problem of conflict congestion at the roundabout by using the signal light control at the peak of traffic volume.At the same time, it also retains the advantages of optimization of traffic environment and good adaptability to traffic conditions.Firstly, the research background of annular intersection is introduced, and the research status at home and abroad at home and abroad is analyzed. The significance and purpose of this paper are determined, so as to establish the main research content and the overall technical route of this paper.Secondly, several common methods for calculating the capacity of roundabout are summarized. Based on the capacity of interlaced area, the method of calculating the design capacity of the entrance of annular intersection is deduced.From this, the control conditions of annular crossover are obtained.Thirdly, several kinds of cycle calculation methods are introduced. Because of the particularity of the annular intersection, the existing signal control can not adapt well. This paper is based on the relationship between the capacity and demand of the ring channel.The ALINEA algorithm is introduced into the loop intersection for signal coordination control, and the dynamic calculation method of signal cycle is discussed.Finally, by analyzing the traffic situation of Xinmin Square, it is found that congestion often occurs during rush hours, and the existing design capacity can no longer meet its demand. Therefore, Xinmin Square is re-channeled and timed.The results of traffic simulation with VISSIM show that if the timing method is suitable, it can not only greatly increase the traffic capacity of the annular intersection, but also adapt to the situation of increasing traffic demand in the future.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.54

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