文章摘要
李启朗,王君霞.基于车辆有限制动能力的交通流模型[J].安徽建筑大学学报,2023,31():
基于车辆有限制动能力的交通流模型
A Traffic Flow Model Based on Mechanical Restriction of Vehicle
投稿时间:2022-11-22  修订日期:2022-12-31
DOI:
中文关键词: 有限制动能力  三相交通流  元胞自动机  夹点效应  中断效应
英文关键词: mechanical restriction  three-phase traffic flow  cellular automaton  pinch effect  interruption effect
基金项目:安徽省高校自然科学基金重点项目(KJ2019A0783)
作者单位E-mail
李启朗 安徽建筑大学 qlli@ahjzu.edu.cn 
王君霞* 安徽建筑大学 3220839363@qq.com 
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中文摘要:
      基于精细化道路格点并引入慢启动规则,建立了一种新的交通流减速度模型。为了使微观车辆行为更符合实际交通中的驾驶行为,模型中考虑了人为过度反应:乐观态和悲观态。分析了在开放边界条件下由入口匝道引起的五种经典的拥挤模式,包括移动同步流模式、局部同步流模式、扩张同步流模式、退化的共存模式以及同步流和堵塞的共存模式等。在不同取值的主路和入口匝道的交通流量下,以时空图、流量-密度关系图等形式复现了经典的拥挤模式。描述了同步流和堵塞的共存模式下同步区域内局部自组织过程以及把移动同步流模式和退化的共存模式区分开来的中断效应。开展基于车辆有限制动能力的入匝道瓶颈处交通流建模以及特性分析,能为高速公路入匝道处的交通管理尤其是避免车辆追尾提供更加准确的决策支持,通过限流等措施有效缓解入匝道附近交通拥堵,提高道路通行能力。
英文摘要:
      Based on the refinement of road grid and the introduction of slow-to-start rule, a new traffic flow deceleration model is established. In order to make the microscopic vehicle behavior more in line with vehicular movement in the real traffic, human overreaction are considered in the model: optimistic state and pessimistic state. Under open boundary condition, the model analyzed five classic congested patterns induced by an on-ramp, which including moving synchronized flow pattern, localized synchronized flow pattern, widening synchronized flow pattern, dissolving general pattern and general pattern. Under the traffic flow of main road and on-ramp with different values, the classical congestion pattern is reproduced in the form of spatio-temporal diagram, flow-density diagram and so forth. The local self-organization process in the synchronous region in general pattern and the interruption effect of distinguishing moving synchronous flow pattern from the dissolving general pattern are described. The study on traffic flow modeling and traffic characteristics at on-ramp bottleneck based on mechanical restriction of vehicle, which can provide more accurate decision support for the traffic management of expressway on-ramp, especially for avoiding rear-end collision of vehicles. Through current restrictions and other measures to effectively alleviate traffic congestion near the on-ramp and improve capacity of expressway.
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