城市道路干線協(xié)調(diào)控制配時優(yōu)化研究
[Abstract]:Since the reform and opening up, with the rapid development of China's economy, the number of urban motor vehicles has increased dramatically. Especially in the past ten years, when more and more people enjoy the convenient and comfortable life brought by motor vehicles, the following problems such as traffic congestion, exhaust emissions and so on also greatly restrict the development of economy and society. We know that the key road sections that lead to urban traffic congestion are urban road intersections, so we need to improve the traffic capacity and minimize the delay of urban intersections. There are many ways to alleviate traffic congestion, including widening the road surface, building viaduct and so on, but these methods are limited because of the shortage of road land. The other is to optimize the timing of a single intersection, but the result of this "separate" optimization scheme is that there is no coordination between the intersections, which may lead to more congestion at some intersections. Therefore, no matter from which point of view, it is urgent to solve the traffic congestion problem. Although some scholars at home and abroad have carried out research in this area, but there are still some shortcomings. This paper starts with the timing of signal lights. First of all, the research background and development status of traffic signal control are described, and the lack of research is analyzed. Secondly, the basic parameters of traffic signal, the basic control method of traffic signal and the evaluation index of control effect related to the coordinated control of urban trunk road are introduced, and the coordinated control mode of trunk line system is analyzed. The coordinated control of urban main road signal lamp is discussed in detail, and the design basis and design idea of the control system are further clarified through the research. Two kinds of phase difference optimization techniques commonly used in trunk road coordination control are described, especially three methods in the maximum green band method are introduced in detail. Then the basic principle and main steps of the coordinated control timing scheme for the main road are summarized. Finally, taking the main road of Vermilion Bird Street in Xi'an as an example, the trunk line coordination control is carried out at several consecutive adjacent intersections of the trunk line. The VISSIM4.3 simulation software satisfying the working length of the road network is used to further verify the coordination control effect. The results show that the vehicle delay and queue length of the trunk line are obviously reduced after the coordinated control of the main road is carried out, which indicates that the coordinated control scheme is effective.
【學(xué)位授予單位】:長安大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:U491.54
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