城市高架道路交通流三参数的现场实测和分析

山东大学学报(工学版)

城市高架道路交通流三参数的现场实测和分析

雷丽¹，宋涛²，董力耘2，刘春芝³

山东大学能源与动力工程学院，山东济南250061；2. 上海大学上海市应用数学和力学研究所，

收稿日期:2005-04-06 修回日期:1900-01-01 出版日期:2006-02-24 发布日期:2006-02-24
通讯作者: 雷丽

Field measurements and analysis of three traffic flow parameters

LEI Li¹，SONG-Tao²，DONG Li-yun²，LIU Chun-zhi³

1.School of Energy and Power Engineering,Shandong University;2.Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University;3.Physics Teaching Group,Jinan Experiment Junior Middle School

Received:2005-04-06 Revised:1900-01-01 Online:2006-02-24 Published:2006-02-24
Contact: LEI Li

摘要/Abstract

摘要： 通过对上海市内环线高架若干路段的大量实测，获取了描述高架路交通宏观特征的交通流参数分布曲线. 采用非线性最小二乘拟合方法，对交通流性质进行分析，得到2种不同形式的速度-密度关系式，并据此得出畅行速度与阻塞密度这2个重要的交通流临界参数. 分析结果表明：指数形式的速度-密度关系适用于描述相对稀疏的交通流；双曲形式适用于描述较拥挤的交通流.

关键词: 高架道路, 速度-密度关系式, 最小二乘拟合

Abstract: The curves of traffic flow parameters describing the traffic macroscopic characteristics are acquired by conducting a series of field measurements on several sections of the Inner Ring Elevated Road in Shanghai City. The fitting method of nonlinear least square is adopted in data processing. Two speed-density relations are worked out based on the analysis of traffic flow, thus two important critical parameters, namely, the free flow speed and the jamming density are determined. The results show that exponential speed-density relation is suitable for the free flow while the hyperbolic relation for the congested flow.

Key words: speed-density relation, least square fitting , elevated road

中图分类号:

U491.1

雷丽,宋涛,董力耘,刘春芝 . 城市高架道路交通流三参数的现场实测和分析[J]. 山东大学学报(工学版), 2006, 36(1): 23-27 .

LEI Li,SONG-Tao,DONG Li-yun,LIU Chun-zhi . Field measurements and analysis of three traffic flow parameters[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2006, 36(1): 23-27 .

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