T型交叉口多速混合交通流特性研究

发布时间：2018-08-31 16:04

【摘要】：近年来,随着国家经济的迅猛发展,使得机动车数量迅速增加,同时造成交通拥堵和交通事故频发。这也吸引越来越多的国内外专家学者关注并投入到交通流理论模型的研究中。解决交通拥堵问题,需要在交通流理论的指导下,对交通进行规划、控制和管理。由于元胞自动机模型演化规则简单、容易实现,可以有有效地模拟交通流中车辆的微观运动状态,从而更加深入理解车辆之间的互相作用机理。因此元胞自动机模型被广泛的应用和发展于交通流研究中。本文首先对交通流理论的发展历程进行介绍,并对微观模型、中观模型、宏观模型中的主要模型进行描述,特别对微观模型中的元胞自动机模型进行重点阐述。然后,基于元胞自动机交通流的理论,建立了在开放边界条件下主干道为双车道,支道分别为单车道和双车道的T型交叉口多速混合元胞自动机模型。本文主要研究内容包括:(1)基于单车道NS模型和双向车流CA模型,综合考虑了混合3种不同速度(快速、中速、慢速)车辆对支道为单车道的T型交叉口系统中平均速度、密度、流量等因素的影响。在开放边界条件下,模拟仿真了T型交叉口系统的混合交通流特性。研究了5种混合比例系数条件下,主干道注入概率与系统中3条车道的平均速度、密度、流量的关系,得出T型交叉口混合交通流基本图。(2)在开放边界条件下,建立了主干道和支道均为双车道的T型交叉口系统元胞自动机模型。在系统模型中,主干道和支道是独立运行的双向车流道路,并且为了避免发生死锁现象,设定在交叉口冲突点处的演化规则。模拟仿真了T型交叉口系统的混合交通流特性。研究了在不同主干道注入概率和不同支道注入概率条件下,支道左转向概率对系统中流量的影响,得出左转向概率-流量基本图。其次,研究了5种混合比例系数条件下支道注入概率与系统中4条车道的平均速度、密度、流量的关系,得出T型交叉口混合交通流基本图。
[Abstract]:In recent years, with the rapid development of the national economy, the number of motor vehicles has increased rapidly, resulting in traffic congestion and frequent traffic accidents. It also attracts more and more experts and scholars from home and abroad to study the traffic flow theory model. To solve the problem of traffic congestion, traffic planning, control and management should be carried out under the guidance of traffic flow theory. Because the evolution rules of cellular automata model are simple and easy to realize, the microscopic motion state of vehicles in traffic flow can be effectively simulated, and the interaction mechanism between vehicles can be better understood. So cellular automata model is widely used and developed in traffic flow research. This paper first introduces the development of traffic flow theory, and describes the main models in micro model, meso model and macro model, especially the cellular automata model in micro model. Then, based on the theory of cellular automata (CA) traffic flow, a multi-speed hybrid cellular automaton model for T-type intersections with two lanes and two lanes is established under open boundary conditions. The main contents of this paper are as follows: (1) based on the single-lane NS model and the two-way CA model, the average speed and density of the T-type intersection system with mixed three different speeds (fast, medium and slow) are considered. The influence of factors such as flow rate. Under the open boundary condition, the mixed traffic flow characteristics of T type intersections are simulated. The relationship between the injection probability of main road and the average speed, density and flow rate of three lanes in the system under five mixed proportional coefficient conditions is studied, and the basic diagram of mixed traffic flow at T-type intersection is obtained. (2) under open boundary conditions, The cellular automata model of T type intersection system is established, in which the main roads and branches are two lanes. In the system model, the main road and branch road are independent two-way traffic flow roads, and in order to avoid deadlock phenomenon, the evolution rules are set at the conflict point of intersection. The mixed traffic flow characteristics of T-type intersection system are simulated and simulated. Under the conditions of different main road injection probability and different branch channel injection probability, the influence of the branch left turning probability on the flow in the system is studied, and the basic diagram of the left turn probability-flow is obtained. Secondly, the relationship between the injection probability of branch roads and the average speed, density and flow rate of four lanes in the system under five mixed proportional coefficients is studied, and the basic diagram of mixed traffic flow at T-type intersections is obtained.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491.112

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