十字交叉口设置逆向可变车道后信号配时设计与仿真研究

发布时间：2018-12-11 22:49

【摘要】：随着近十几年来我国机动车保有量的急剧增加,城市交通拥堵现象越来越严重,十字交叉口是城市交通的关键节点,而左转车流又是交叉口最难处理的一部分车流,因此如何处理好左转车流成为缓解城市交通拥堵的关键。本文提出在保证安全的前提下,周期性的将左转车辆提前引入对面的出口道,然后跟随本方向左转车辆一起放行方法来减少左转车流对交叉口的影响。论文首先介绍了研究的背景、主要内容以及技术方法,针对城市交通拥堵的现状,论文介绍了导流岛、交叉口进口道拓宽、设置待行区、可变车道几种渠化方法,并肯定了其对现阶段缓解城市交通拥堵的积极作用。在同向可变车道的基础上提出了设置逆向可变车道即左转车流借用对面出口道的方法。论文第三章介绍了逆向可变车道的定义并对比了其与普通平面交叉渠化方式的异同点,接着定性分析了设置逆向可变车道的前提条件,然后根据城市道路规范对逆向可变车道的长度和宽度进行了规定,最后提出了逆向可变车道在一个周期内开启和关闭时间的控制方式。论文第四章介绍了信号配时的基础概念,提出将Webster配时方法与双目标优化配时方法与逆向可变车道结合起来,在配时过程中不仅要考虑逆向可变车道的存在对交叉口造成的影响,还要考虑逆向可变车道在一个周期内开启和关闭的时间,在此基础上形成交叉口新的渠化和配时方案。论文第五章结合青岛市的一个十字交叉口进行实例分析,介绍了在实际工程中设置逆向可变车道与优化的具体过程,最后通过仿真软件来对比设置逆向可变车道前后交叉口的指标参数,从而得出设置逆向可变车道对交叉口的意义。在城市用地越来越紧张的前提下,与其他渠化方法相比,设置左转逆向可变车道的方法施工简单,投资成本低,可以在不动用大工程的前提下充分有效的利用现有的空间资源,为城市的交通渠化提供了一个新的方向。
[Abstract]:With the rapid increase in the number of motor vehicles in China in recent years, the phenomenon of urban traffic congestion is becoming more and more serious. Intersection is the key node of urban traffic, and the left-turn traffic flow is the most difficult part of the traffic flow at the intersection. Therefore, how to deal with the left-turn traffic flow is the key to alleviate urban traffic congestion. In order to reduce the influence of the left-turn traffic flow on the intersection, this paper proposes a method to reduce the impact of left-turn traffic flow on the intersection by periodically introducing the left-turn vehicle into the opposite exit lane in advance and then following the left-turn vehicle in the same direction to release the vehicle together on the premise of ensuring safety. Firstly, this paper introduces the background, main contents and technical methods of the research. In view of the current situation of urban traffic congestion, the paper introduces several methods of channelization, such as diversion island, widening of intersections, setting up waiting areas and variable lanes. And affirmed its to the present stage alleviates the city traffic jam the positive function. On the basis of the same direction variable lane, the method of setting the reverse variable lane is put forward, that is, the left turn vehicle flow borrows the opposite exit lane. In the third chapter, the definition of reverse variable lane is introduced, and the similarities and differences between the reverse variable lane and the common plane crossing channel are compared, and then the premise of setting the reverse variable lane is qualitatively analyzed. Then the length and width of the reverse variable lane are defined according to the urban road specifications. Finally, the control mode of the opening and closing time of the reverse variable lane in a period is proposed. In chapter 4, the basic concept of signal timing is introduced, and the combination of Webster timing method and dual objective optimal timing method and reverse variable lane is proposed. In the process of timing, not only the impact of the existence of the reverse variable lane on the intersection, but also the time of opening and closing of the reverse variable lane in a period should be considered. On this basis, a new channelization and timing scheme of the intersection should be formed. In the fifth chapter, the concrete process of setting up the reverse variable lane and optimizing in the actual engineering is introduced, which is based on a case study of a cross intersection in Qingdao. Finally, the significance of setting the reverse variable lane to the intersection is obtained by comparing the index parameters of the intersection before and after setting the reverse variable lane through the simulation software. Under the premise of increasing shortage of urban land, compared with other methods of channelization, the method of setting left turn and reverse variable lane is simple in construction and low in investment cost, so it can make full and effective use of existing space resources without using large projects. It provides a new direction for the traffic channelization of the city.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.23

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