基于统计特性的城市快速路交通流状态划分  

Phase Identification of Urban Freeway Traffic Based on Statistical Properties

作　　者：关伟[1] 何蜀燕[1] 

机构地区：[1]北京交通大学交通运输学院系统工程与控制研究所,北京100044

出　　处：《交通运输系统工程与信息》2007年第5期42-50,共9页Journal of Transportation Systems Engineering and Information Technology

基　　金：国家高技术研究发展计划项目(2006AA11Z212);国家重点基础研究发展计划项目(2006CB705507);教育部科学技术研究重点项目(106031)

摘　　要：目前交通流理论研究的主要对象为高速公路,与其相比,城市快速路交通流则具有明显不同的特点.交通科学是一门说证科学,在实证数据的基础上,首先对城市快速路交通流速度概率分布进行了研究,分析了在不同密度条件下速度概率分布的特性.在此基础上,在流—密平面中将交通流划分为自由流、谐动流、同步流和堵塞4个稳态相位,并具体讨论了各个相位的性质,定量标定了每个相位的区域范围.At present, researches on traffic flow theory are mainly focus on highway traffic, which is significantly different from urban freeway. Because traffic science is an ＂empirical science＂, thus based on actual traffic flow data of urban freeway, the statistical features of velocity distribution at different density were investigated in this paper. Then, four steady phases： free flow, coherent-moving flow, synchronized flow and jam are identified in flow- rate-density plane of traffic flow, Finally, features of the four phases as well as functional forms of phase boundaries were discussed in detail.

关 键 词：城市快速路 交通流理论 交通流状态划分 统计分析 

分 类 号：U491.265[交通运输工程—交通运输规划与管理]