暴雨对快速路速度—密度关系影响的实证分析

交通运输系统工程与信息 ›› 2016, Vol. 16 ›› Issue (3): 221-227.

暴雨对快速路速度—密度关系影响的实证分析

孙洪运¹，杨金顺²，吴兵*¹

1. 同济大学道路与交通工程教育部重点实验室，上海201804；2. 青岛理工大学汽车与交通学院，山东青岛266555

收稿日期:2015-12-04 修回日期:2016-01-21 出版日期:2016-06-25 发布日期:2016-06-27
作者简介:孙洪运（1985-），男，山东临沂人，博士生.

Empirical Analysis of Speed-density Relationships for Urban Expressway under Rainstorm Condition

SUN Hong-yun¹, YANG Jin-shun², WU Bing¹

1. Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China; 2. School of Automobile and Transportation, Qingdao University of Technology, Qingdao 266555, Shandong, China

Received:2015-12-04 Revised:2016-01-21 Online:2016-06-25 Published:2016-06-27

摘要/Abstract

摘要：

研究了暴雨对不同车道数的城市快速路交通运行的影响.首先估算了暴雨下自由流车速、通行能力等关键参数下降幅度；然后利用最小二乘法标定了6 种连续型速度—密度模型，最后评价了模型估计关键参数能力和预测车速能力.研究表明：暴雨下路段的自由流车速和通行能力下降幅度、模型估计关键参数能力和预测车速能力都随车道数不同而不同.因此有必要区分暴雨对不同车道数快速路路段的影响.

关键词: 交通工程, 速度-密度模型, 最小二乘法, 车道数, 自由流车速, 通行能力

Abstract:

This paper investigates the impacts of rainstorm condition on traffic operation of multi-lane urban expressways. Firstly, reductions in free- flow speed and capacity are calculated. Secondly, six oneregime speed-density models are calibrated by least square method. Finally, best models for key parameter estimation and for operating speed prediction are assessed. Results show that reductions in free-flow speed and capacity, and the abilities to estimate key parameter and to predict operating speed vary with different number of lanes under rainstorm condition. Therefore, it necessitates distinguishing rainstorm' s impacts on urban expressway segments with different number of lanes.

Key words: traffic engineering, speed-density model, least-square method, number of lanes, free-flow speed, capacity

中图分类号:

U491.2

孙洪运，杨金顺，吴兵. 暴雨对快速路速度—密度关系影响的实证分析[J]. 交通运输系统工程与信息, 2016, 16(3): 221-227.

SUN Hong-yun, YANG Jin-shun, WU Bing. Empirical Analysis of Speed-density Relationships for Urban Expressway under Rainstorm Condition[J]. Journal of Transportation Systems Engineering and Information Technology, 2016, 16(3): 221-227.

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http://www.tseit.org.cn/CN/Y2016/V16/I3/221

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