多路段元胞自动机交通流模型

发布时间：2018-01-04 16:05

本文关键词：多路段元胞自动机交通流模型　出处：《物理学报》2017年19期 　论文类型：期刊论文

【摘要】：在经典单路段元胞自动机交通流模型的基础上,将多个路段视为一个道路系统,提出并研究了多路段条件下的交通流问题.针对多路段道路的特点,通过引入车辆流入规则、路口随机慢化规则和路口车辆流入规则,控制车辆从上一路段流入下一路段.首先提出了"汽车池"的概念,来控制每一路口车辆的流入;然后通过路口随机慢化,来模拟路口对交通的影响;最后,当车辆离开时,依直行率进入下一路段,实现车流的继续流动.同时,通过数值模拟,仿真了不同条件下的交通情况,对重要参数进行了研究.结果表明,出现了混合流这一新的现象,拥堵地段与非拥堵地段间存在明显的界限.拥堵往往最先从路口开始,然后蔓延到整个路段.多路段道路还存在临界突变的特性.随着车辆流入概率的增大,路口对平均速度和车流密度的影响愈加明显.当流入概率超过一定阈值时,车辆缓慢地增加也会引起整体道路通行能力的迅速下降.
[Abstract]:Based on the classic single road traffic cellular automaton model, a plurality of sections as a road system, proposed and researched the traffic flow problem of road conditions. According to the characteristics of multi section of the road, through the introduction of the vehicle into the intersection of randomization rules, rules and rules to control the vehicle traffic flow, from the previous sections into the next sections. Firstly put forward the concept of "car pool", inflows to control each of the vehicles at the intersection; then through randomization, to simulate the influence of the traffic intersection; finally, when the vehicle left, according to the rate of straight into the next section, continue to realize traffic flow at the same time, through numerical simulation, the simulation of traffic under different conditions, the important parameters were studied. The results showed that the mixed flow of this new phenomenon, congestion and non congestion area area between the clear boundaries. Congestion It is often the first start from the intersection, and then spread to the entire road. The road is more characteristic of critical mutations. With the increase of vehicle flow probability, affect the intersection of the average velocity and density are more and more obvious. When the inflow probability exceeds a certain threshold, the vehicle slowly increased with rapid decline will lead to the capacity of the whole road.

【作者单位】：国防科学技术大学信息系统与管理学院;长沙学院计算机工程与应用数学学院;
【基金】：国家自然科学基金(批准号:61571453) 湖南省自然科学基金(批准号:14JJ3010) 湖南省教育厅重点项目(批准号:15A020)资助的课题~~
【分类号】：U491
【正文快照】： 1引言 21世纪,机动车己成为主要的道路交通工具,交通问题也成为衡量城市发展的一个重要因素W.交通流的非线性、复杂性和离散性使得物理学、数学等多学科的研究者投入交通流问题的研究U-321.元胞自动机具有时间离散化、空间离散化、相互作用的局域化和动力学演化同步性等特点,

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