高速公路交通流元胞自动机建模及大货车的影响分析

发布时间：2018-01-04 06:28

本文关键词：高速公路交通流元胞自动机建模及大货车的影响分析　出处：《中南大学学报(自然科学版)》2017年10期 　论文类型：期刊论文

【摘要】：在分析国内4车道高速公路交通特性的基础上,根据动机将换道分为无倾向型和有倾向型,描述法定换道规则,建立相应的元胞自动机模型,用实测交通流参数标定和验证模型。研究结果表明:随着大货车比率增大,大货车对快车道的占用增多,小客车速度降低,上述变化在大货车比率小于0.25时更显著并与密度相关;当大货车比率很小时,随着大货车动力性能降低,小客车速度降低,换道和冲突增多,这些变化在中密度区最显著;在临界密度附近,随着大货车比率变化,可随机观察到典型的移动瓶颈和偏析效应。
[Abstract]:On the basis of analyzing the traffic characteristics of domestic four-lane freeway, this paper classifies the change of lanes into non-inclined type and inclined type according to the motivation, describes the legal changing rules, and establishes the corresponding cellular automata model. The model is calibrated and validated with the measured traffic flow parameters. The results show that with the increase of the ratio of large freight cars, the occupation of large freight cars to the fast lane increases, and the speed of passenger cars decreases. The above changes are more significant when the freight car ratio is less than 0.25 and is related to the density. When the ratio of large freight cars is very small, the speed of minibus decreases, and the change of lane and conflict increases with the decrease of power performance of large freight cars. These changes are most significant in the medium density region. In the vicinity of critical density, typical moving bottlenecks and segregation effects can be observed at random with the variation of the ratio of large freight cars.
【作者单位】：长沙理工大学公路工程教育部重点实验室;
【基金】：国家自然科学基金资助项目(51338002,51678076,51408058) 湖南省教育厅资助项目(16B008) 长沙理工大学公路工程教育部重点实验室开放基金资助项目(KFJ130101)~~
【分类号】：U491.112
【正文快照】： 通过建立交通流模型,可实现对交通流现象的再现、解释和预测。王殿海等[1]根据建模思想将微观模型分为交通工程类和统计物理类,前者侧重于精确拟合实际驾驶参数来准确描述微观驾驶行为,后者侧重于用简单的微观驾驶规则来展现复杂的交通流宏观特性。不同模型对交通流现象的解释

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