基于赋色Petri网的公交优先信号控制建模与分析
发布时间：2018-08-03 18:20
【摘要】：随着城市化大规模的发展,城市交通问题日益严重。优先发展城市公共交通是解决交通问题的有效途径,在道路资源有限的情况下,公交信号优先是实现公交优先技术的方法之一,能够有效减少交叉口延误以及提高公交运行效率。本文在充分考虑城市道路交叉口信号控制和公交优先特性的基础上,采用绿灯延长和红灯早断两种策略,利用赋色Petri网(CPN)对公交优先信号控制进行建模和分析,主要内容有:1.通过分析目前国内外在公交优先控制方面的研究成果,对公交优先信号控制基本理论进行了介绍。针对城市交通交叉口信号灯的相位特征,采用赋色Petri网对城市道路中交叉口信号控制进行层次化建模,分别建立了四相位和两相位的信号控制CPN模型。2.针对城市道路中交叉口公交车辆通行延误大,道路资源和交通信号均无法满足公交车辆的优先通行权,提出了一种基于CPN的公交优先信号控制方法。该方法以保证交叉口公交车辆优先通行为目标,通过采用绿灯延长和红灯早断两种公交优先策略,实现交叉口公交优先信号控制,分别建立了四相位和两相位的公交优先信号控制CPN模型。3.为了确保公交优先信号控制CPN模型的正确性与可靠性,采用状态空间的构造算法模拟出模型所经历的状态,得到了CPN模型的状态空间。通过对状态空间的分析验证了模型的基本性质。从而展现了该模型在解决城市道路中公交优先信号控制问题方面,具有良好的表现性能,能够实现公交车辆优先通行的目的。
[Abstract]:With the development of urbanization, urban traffic problem is becoming more and more serious. Priority development of urban public transport is an effective way to solve traffic problems. In the case of limited road resources, bus signal priority is one of the methods to realize bus priority technology. It can effectively reduce intersections delay and improve the efficiency of bus operation. On the basis of fully considering the characteristics of signal control and bus priority of urban road intersection, this paper adopts two strategies: green light extension and red light early break, and uses colored Petri net (CPN) to model and analyze the bus priority signal control. The main content is: 1. The basic theory of bus priority signal control is introduced by analyzing the research results of bus priority control at home and abroad. Aiming at the phase characteristics of the signal lights at urban traffic intersections, a hierarchical model of signal control for intersections in urban roads is established using colored Petri net, and the signal control CPN model of four phases and two phases is established, respectively. A method of bus priority signal control based on CPN is proposed to solve the problem of bus traffic delay at intersections in urban roads and the inability of road resources and traffic signals to meet the priority rights of public transport vehicles. The method aims at ensuring the priority of bus traffic at intersections and realizes the control of bus priority signals by adopting two bus priority strategies: green light prolongation and red light early break. The four phase and two phase bus priority signal control CPN model. 3. In order to ensure the correctness and reliability of the CPN model for bus priority signal control, the state space of the CPN model is obtained by using the state space construction algorithm to simulate the state of the model. The basic properties of the model are verified by analyzing the state space. It shows that the model has good performance in solving the problem of bus priority signal control in urban roads and can achieve the purpose of bus priority.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.54
本文编号：2162574
[Abstract]:With the development of urbanization, urban traffic problem is becoming more and more serious. Priority development of urban public transport is an effective way to solve traffic problems. In the case of limited road resources, bus signal priority is one of the methods to realize bus priority technology. It can effectively reduce intersections delay and improve the efficiency of bus operation. On the basis of fully considering the characteristics of signal control and bus priority of urban road intersection, this paper adopts two strategies: green light extension and red light early break, and uses colored Petri net (CPN) to model and analyze the bus priority signal control. The main content is: 1. The basic theory of bus priority signal control is introduced by analyzing the research results of bus priority control at home and abroad. Aiming at the phase characteristics of the signal lights at urban traffic intersections, a hierarchical model of signal control for intersections in urban roads is established using colored Petri net, and the signal control CPN model of four phases and two phases is established, respectively. A method of bus priority signal control based on CPN is proposed to solve the problem of bus traffic delay at intersections in urban roads and the inability of road resources and traffic signals to meet the priority rights of public transport vehicles. The method aims at ensuring the priority of bus traffic at intersections and realizes the control of bus priority signals by adopting two bus priority strategies: green light prolongation and red light early break. The four phase and two phase bus priority signal control CPN model. 3. In order to ensure the correctness and reliability of the CPN model for bus priority signal control, the state space of the CPN model is obtained by using the state space construction algorithm to simulate the state of the model. The basic properties of the model are verified by analyzing the state space. It shows that the model has good performance in solving the problem of bus priority signal control in urban roads and can achieve the purpose of bus priority.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.54
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