摘要
文中以上海延安高架的实测交通数据和小时降雨量数据进行匹配分析,研究了不同降雨等级下交通流三参数变化规律.分析不同降雨等级下的速度-密度模型,基于Greenshield经典V-K模型,构建速度-密度-降雨量三维模型,代入实测数据得到具体模型表达式,拟合度达83.81%,并对该模型进行实例验证.结果表明:速度、密度、降雨量三者相互影响,三维模型验证评价指标中平均绝对误差为3.59 km/h,均方根误差为4.75 km/h,模型符合降雨天气下的实际交通流状态.
Based on the matching analysis of the measured traffic data and hourly rainfall data of Yan’an Elevated Road in Shanghai,the variation law of three parameters of traffic flow under different rainfall levels was studied.The velocity-density model under different rainfall levels was analyzed,and a three-dimensional velocity-density-rainfall model was constructed based on the classic V-K model of Greenshield.The specific model expression was obtained by substituting the measured data,with the fitting degree 83.81%,and the model was verified by an example.The results show that the speed,density and rainfall affect each other.The average absolute error and root mean square error in the three-dimensional model verification evaluation index are 3.59km/h and 4.75 km/h,and the model conforms to the actual traffic flow state in rainy weather.
作者
何雅琴
刘凯慧
HE Yaqin;LIU Kaihui(School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)
出处
《武汉理工大学学报（交通科学与工程版）》
2023年第2期229-233,共5页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
国家自然科学基金(51408445)。
关键词
降雨天气
城市快速路
交通流三参数
速度-密度模型
rainy weather
urban expressway
three parameters of traffic flow
speed-density model
作者简介
第一作者:何雅琴(1982-),女,博士,副教授,主要研究领域为交通安全、交通管理与控制。
