过饱和状态下城市中心区交通干线信号优化方法研究

发布时间：2018-03-22 18:04

本文选题：信号优化　切入点：交通波理论　出处：《西南交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：城市道路交通干线是城市交通网络的骨架,干线的畅通与否会直接影响到网络整体的正常运行。城市中心区域土地开发强度大,车流量超过道路网络的通行能力,再加上中心城区行人过街等不确定因素的横向干扰,导致干线信号协调方案失效,次干道和支路也无法有效的发挥出微循环的正常功效,带来区域性交通拥堵。此时,通过传统地以均衡各个方向交通流为目标的配时优化和干线信号协调控制,已经不适应过饱和状态下的交通管理对于缓堵控制需求。本文将在饱和或者过饱和交通状态下,干线存在随机不确定干扰因素的环境中,对城市中心区干道的信号优化控制思路和方法进行研究。本文首先针对国内外过饱和交通条件下,信号控制相关方面的研究进行综述分析。提出现有信号控制方法的优劣,并且针对各个方法不完善的方面提出解决思路。其次,以交叉口信号控制相关理论为基础,结合交叉口信号控制方案的优化经验做法,提出了本文对过饱和状态下城市干线信号优化的流程和方法。然后基于过饱和状态下交通流特性的分析,提出改进的信号交叉口排队长度估算模型,并进一步研究根据上下游信号相位相关性强弱确定信号配时的方法,最终完成城市中心区干线信号优化控制方法策略。最后,通过建立微观交通仿真模型对本文提出的优化方案进行仿真验证。论文以PARAMICS软件作为仿真平台,应用其行人仿真模块加载路段行人干扰,通过对软件PLUGIN程序的开发,去拓展模拟平台中对信号灯的控制机理,从而对本文信号优化控制方法进行仿真实验评价。
[Abstract]:The urban road traffic trunk line is the skeleton of the urban traffic network. Whether the trunk line is smooth or not will directly affect the normal operation of the whole network. The development intensity of the land in the urban center area is great, and the traffic flow exceeds the traffic capacity of the road network. In addition, due to the lateral interference of uncertain factors such as pedestrian crossing in the central urban area, the coordination scheme of the trunk line signal will fail, and the secondary trunk roads and branches will not be able to effectively exert the normal function of microcirculation and bring about regional traffic jams. Through the traditional timing optimization with the goal of balancing traffic flow in various directions and the coordinated control of trunk signal, traffic management in supersaturated condition is not suitable for slow blocking control. In this paper, the traffic flow will be saturated or supersaturated. In the environment of random and uncertain interference factors in trunk roads, the optimal control method of trunk roads in urban center is studied. In this paper, firstly, the research on signal control is summarized and analyzed under the condition of oversaturated traffic at home and abroad. The advantages and disadvantages of existing signal control methods are put forward, and the solutions to these problems are put forward. Secondly, based on the related theory of intersection signal control, combined with the optimization experience of intersection signal control scheme, Based on the analysis of traffic flow characteristics under supersaturated condition, an improved queue length estimation model for signalized intersections is proposed. Furthermore, the method of determining signal timing according to the intensity of phase correlation between upstream and downstream signals is further studied, and the optimal control strategy of trunk line signal in urban center area is finally completed. Finally, the optimization scheme is verified by establishing microscopic traffic simulation model. In this paper, the PARAMICS software is used as the simulation platform, the pedestrian interference is loaded with the pedestrian simulation module, and the software PLUGIN program is developed. The control mechanism of the signal lamp in the simulation platform is expanded, and the simulation experiment evaluation of the signal optimization control method in this paper is carried out.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U491.54

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