交通运输系统工程与信息 ›› 2008, Vol. 8 ›› Issue (5): 26-31 .

• 智能交通系统与信息技术 • 上一篇    下一篇

HMI—城市快速路交通拥堵的一个预警指标

关 伟*;何蜀燕;马继辉   

  1. 北京交通大学 交通运输学院,北京 100044
  • 收稿日期:2008-04-09 修回日期:2008-06-18 出版日期:2008-10-25 发布日期:2008-10-25
  • 通讯作者: 关 伟
  • 作者简介:关伟(1968-),男,安徽霍丘人,教授,博士生导师.
  • 基金资助:

    国家高技术研究发展计划(2006AA11Z212);国家重点基础研究发展计划(2006CB705507);教育部科学技术研究重点项目(106031)和高等学校博士学科点专项科研基金(20070004020)。

HMI—Prewarning Index of Traffic Jam Formation on Urban Freeway

GUAN Wei;HE Shu-yan;MA Ji-hui   

  1. School of Traffic and Transportation,Beijing Jiaotong University, Beijing 100044, China
  • Received:2008-04-09 Revised:2008-06-18 Online:2008-10-25 Published:2008-10-25
  • Contact: GUAN Wei

摘要: 借鉴定性推理中描述参数的相关方法,首先提出了描述城市快速路各车道交通流同态程度的概念——同态度量指数(Homogeneous Measure Index ,HMI),大量对快速路的实证研究得到的HMI指数反应了不同情况下交通流状态的定性差异。通过对北京环路交通拥堵发生与消散过程的观察和分析,本文发现当交通拥堵发生或消散的过程被触发时,不同车道交通流的同态度量指数HMI会发生定性跃迁变化,并且各车道交通流的同态性变化将是一个“同态 非同态同态”的过程,因此可以利用这一性质,将HMI作为一个指标来对城市快速路交通拥堵是否可能发生进行预警。

关键词: 城市快速路, 交通流, 交通拥堵, 预警指标

Abstract: In this paper, referring to the concepts of qualitative reasoning, the concepts, such as homogeneous measure index (HMI), are utilized to calculate the cross-lane synchronized degree of the traffic flow. The actual data of Beijing Third Ring Road are presented to describe the procedure of formation of traffic jam, and the concepts proposed in this paper are used to clearly illustrate such procedure. From the empirical data of traffic flow, we find out that for a multi-lane road, before the formation of traffic jam ,the HMI of the traffic flow will change abruptly and the state transition from homogeneous (H-S) to non-homogeneous state (N-S) is likely occur. Therefore, the HMI can be considered as a prewarning index of the formation of traffic jam.

Key words: unban freeway, traffic flow, traffic jam, prewarning index

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