基于排队长度的信号交叉口左转可变导向车道控制研究

发布时间：2019-05-13 14:58

【摘要】：各方向交通流不均衡是导致城市道路信号交叉口拥挤的原因之一,特别是对于交通量较大的拓宽交叉口,当某一时段左转交通量较大时随着停车排队车辆的增加左转车辆会占用直行车道,从而影响直行车辆的正常通行,通过实施左转可变导向车道可以有效缓解该矛盾的产生。因此,本文基于交叉口左转与直行相位的车辆排队长度研究实施左转可变导向车道的阈值条件。本文在排队长度、饱和度、通行能力和延误等理论的基础上探讨了信号交叉口左转可变导向车道的阈值条件。首先介绍了左转可变导向车道的研究背景、意义现状及研究内容,提出设置左转可变导向车道的概念、渠化条件、交通条件以及信号配时条件,并介绍了不同的排队长度模型,通过分析不同排队长度模型的优缺点确定适合的排队长度模型;然后通过研究排队长度与饱和度之间的关系,从交叉口有无初始排队两个方面分析城市道路在不同饱和度的情况下左转可变导向车道设置的阈值条件;之后对信号交叉口左转可变导向车道属性变化时的主预信号协调控制关系进行了理论推导和分析;最后通过VISSIM仿真对交叉口实施左转可变导向车道前后的效果进行仿真,通过对比延误、排队长度分析设置左转可变导向车道的效果,证明了设置左转可变导向车道能够有效地降低信号交叉口的延误,减小排队长度。
[Abstract]:The uneven traffic flow in all directions is one of the reasons for the congestion of urban road signalized intersections, especially for the widening intersections with large traffic volume. When the left turn traffic volume is large in a certain period of time, the left turn vehicle will occupy the straight lane with the increase of the parking queue, which will affect the normal traffic of the straight vehicle, and the contradiction can be effectively alleviated by the implementation of the left turn variable guide lane. Therefore, based on the vehicle queue length of left turn and straight phase at intersection, the threshold condition of left turn variable guide lane is studied in this paper. Based on the theories of queue length, saturation, traffic capacity and delay, the threshold conditions of left-turn variable guide lane at signalized intersections are discussed in this paper. Firstly, this paper introduces the research background, significance and research content of left-turn variable guide lane, puts forward the concept, channelization condition, traffic condition and signal timing condition of setting left-turn variable guide lane, and introduces different queue length models. The suitable queue length model is determined by analyzing the advantages and disadvantages of different queue length models. Then, by studying the relationship between queue length and saturation, the threshold conditions of left-turn variable guide lane setting of urban roads under different saturation are analyzed from two aspects: whether there is initial queuing at intersection or not. After that, the coordinated control relationship of the main pre-signal when the attribute of the left-to-left variable guide lane changes at the signalized intersection is deduced and analyzed theoretically. Finally, the effect of left-turn variable guide lane is simulated by VISSIM simulation, and the effect of setting left-turn variable guide lane is analyzed by comparing delay and queue length. It is proved that the left-turn variable guide lane can effectively reduce the delay and queue length of signalized intersections.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.23

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