文章编号： 1672-5328（2018）05-0091-08

吴琰飘1，蔡晓禹2, 3，陈明亮4，李静2
(1.西南交通大学交通运输与物流学院，四川成都610031；2.重庆交通大学交通运输学院，重庆400074；3.重庆 交通大学山地城市交通系统与安全重庆市重点实验室，重庆400074；4.中铁二院工程集团有限责任公司，四川 成都610031)

摘要： 准确分析交通拥堵传播特征是预测交通拥堵状态进而解决拥堵问题的先决条件。首先结合实 际交通状态，提出速度延伸判别指数(ESDI)，并将道路拥堵状态划分为5 个等级，界定各等级阈 值，构造拥堵马赛克时空图。提出矩形法绘制规则，建立交通拥堵演变的传播模型分析法，研究拥 堵和消散传播规律与特征，有效计算传播速度。最后以重庆市黄花园大桥为例进行建模验证，研究 表明，基于ESDI 的道路交通状态判别方法能正确划分路段所处拥堵状态，基于矩形法的交通拥堵 传播模型能有效得到道路拥堵演变特征，包括常发或偶发性拥堵、消散的起止时间、传播速度及发 生原因等。

关键词： 交通工程；交通状态判别；拥堵传播模型；拥堵马赛克时空图；矩形法

中图分类号： U491

文献标识码：A

A Study of the Traffic Congestion Propagation Model Based on the Rectangle Method

Wu Yanpiao1, Cai Xiaoyu2, 3, Chen Mingliang1, Li Jing2
(1.School of Transportation and Logistics, Southwest Jiaotong University, Chengdu Sichuan 610031, China; 2.School of Traffic & Transportation，Chongqing Jiaotong University, Chongqing 400074, China; 3. Chongqing Key Lab of Traffic System & Safety in Mountain Cities, Chongqing Jiaotong University, Chongqing 400074, China; 4.China Railway Eryuan Engineering Group Co. Ltd., Chengdu Sichuan 610031, China)

Abstract： Traffic congestion problems affect people's travel efficiency. Accurate analysis of traffic congestion propagation characteristics is a prerequisite for predicting traffic and solving traffic congestion problems. This paper proposes the Extended Speed Distinguish Index (ESDI) based on the actual traffic status, divides the traffic status into five levels and defines the thresholds of each level to construct congestion mosaic time-space diagrams. Then the paper proposes the drawing rules of the‘rectangle method’, establishes the propagation analytical method to model the evolution of traffic congestion, studies laws and characteristics of congestion and dissipation, and effectively calculates the propagation speed. Finally, a road segment in Chongqing is used as an example to analyze and verify the proposed model. The results show that the ESDI-based traffic status discrimination method can correctly determine the congestion status on a road segment. The results also show that the traffic congestion propagation model based on the‘rectangle method’can effectively model the traffic congestion evolution characteristics, including the start and end times, the propagation speed and the causes of recurring and non-recurring traffic congestions.

Keywords： transportation engineering; traffic status identification; congestion propagation model; congestion mosaic time-space diagram; rectangle method