Journal of Transportation Systems Engineering and Information Technology ›› 2017, Vol. 17 ›› Issue (5): 151-156.

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Traffic Influence Degree of Urban Traffic Emergency Based on Water Wave Principle

HE Ya-qin, RONG Yu-lun, LIU Zu-peng, DU Sheng-pin   

  1. School of Automobile and Traffic Engineering,Wuhan University of Science and Technology,Wuhan 430081, China
  • Received:2017-06-20 Revised:2017-07-28 Online:2017-10-25 Published:2017-10-30

基于水波原理的城市突发事件交通影响程度研究

何雅琴*,容煜伦,柳祖鹏,杜胜品   

  1. 武汉科技大学汽车与交通工程学院,武汉430081
  • 作者简介:何雅琴(1982-),女,湖北嘉鱼人,副教授.
  • 基金资助:

    国家自然科学基金/National Natural Science Foundation of China(51408445,61403286).

Abstract:

Analysis of traffic influence degree of urban emergency has important theoretic significance and realistic value for adopting corresponding traffic emergency countermeasures. In this paper, based on water wave principle, traffic influence of urban emergency is considered as the effect of throwing a stone into water. Traffic impact coefficient is proposed and can be defined to represent the traffic influence degree of emergency. Concept of accumulative traffic impact coefficient is introduced and the theory model is established using double integral, which can be used to evaluate the comprehensive influence degree on surrounding road network. Taking a traffic accident as an example, time-space distribution diagram of traffic impact coefficient is obtained based on data filtering and sorting. According the characteristics of variation curve of traffic impact coefficient by time and distance, the relationship model among traffic impact coefficient, time and distance is established using MATLAB. Finally, the calculated value of comprehensive influence degree is 0.466 7, which means that this accident brings a great influence on surrounding traffic system.

Key words: urban traffic, traffic influence degree, water wave theory, emergency, speed ratio

摘要:

分析城市突发事件对交通的影响程度,从而采取相应的交通应急对策,具有重要的现实意义.本文借助水波原理,将城市突发事件对交通的影响比拟成往水中扔石头产生的效应.提出了交通影响系数概念,并以此来界定突发事件对交通的影响程度;引入累积交通影响系数概念,利用二重积分构建了累积交通影响系数理论模型,从而评价突发事件对周边路网的综合交通影响程度.选取一起交通事故为例,在对调查数据筛选和整理的基础上,得到了交通影响系数时空分布图;根据交通影响系数随时间和距离的变化曲线特征,利用MATLAB构建了交通影响系数与时间和距离的关系模型;最后计算得到了事故的综合交通影响程度为0.466 7,结果表明该起事故对周边交通的影响较大.

关键词: 城市交通, 交通影响程度, 水波原理, 突发事件, 车速比

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