基于跟驰模型的雾天安全限速模拟研究  

Simulation Study on Safety Speed Limit of Fog Weather Based on Car Following Model

作　　者：于乐美 张萌萌[1] 王星月 YU Le-mei;ZHANG Meng-meng;WANG Xing-yue(Transportation and Logistics Engineering,Shandong Jiaotong University,Jinan 250357,China)

机构地区：[1]山东交通学院交通与物流工程学院,济南250357

出　　处：《科学技术与工程》2018年第33期224-229,共6页Science Technology and Engineering

基　　金：国家自然科学基金(ZR2017MF011);全国统计科学研究项目(2017LZ22);山东省重点研发计划(2017GGX50110)资助

摘　　要：为准确描述雾天交通流特性,挖掘交通流速度以及交通状态的关系,通过对不同气质的驾驶人在不同能见度下的驾驶行为进行问卷调查,分析雾天驾驶人的驾驶心理特性,在Na Sch模型中引入加速概率,改变以往加速过程中的贪婪机制,构建考虑雾天驾驶心理的道路交通流模型。通过数值模拟,得到不同能见度水平下车流密度、车头间距、速度以及排队长度的变化趋势,并利用主成分分析法构建交通运行水平模型,为高速公路雾天不同能见度下选择合适的限速值和行车间距建议值提供辅助决策。In order to accurately describe the characteristics of fog traffic flow and to excavate the relationship between traffic flow speed and traffic state,the psychological characteristics of driving in fog,the driving behavior of different temperament drivers in different visibility condition is investigated through the questionnaire,and the acceleration probability is introduced into the NaSch model according to the questionnaire results,changing the greed mechanism of the previous accelerate process to build the road traffic flow model considering the driving psychology in fog.The variation trend of vehical flow density,headway,speed and queue length are obtained in different visibility level through numerical simulation,and used to establish the traffic operation level model by principal component analysis method,which provides assistant decision-making for selecting the appropriate speed limit value and headway value recommended.

关 键 词：公路运输 雾天跟驰模型 元胞自动机 交通流 驾驶心理 

分 类 号：U491.112[交通运输工程—交通运输规划与管理]