交通运输系统工程与信息 ›› 2011, Vol. 11 ›› Issue (6): 104-110.

• 系统工程理论与方法 • 上一篇    下一篇

基于影响度的有效路径集合的确定

杨信丰a, 刘兰芬*a, 李引珍a,b, 何瑞春a   

  1. 兰州交通大学 a.交通运输学院; b.西北交通经济研究中心, 兰州 730070
  • 收稿日期:2011-07-21 修回日期:2011-09-06 出版日期:2011-12-25 发布日期:2012-01-04
  • 作者简介:杨信丰(1978-),男,河南开封人,副教授,博士.
  • 基金资助:

    国家自然科学基金项目(60870008,61064012);教育部人文社会科学研究项目(11XJC630009).

Determining the Efficient Paths Based on Effect Degree

YANG Xin-fenga, LIU Lan-fena, LI Yin-zhena,b, HE Rui-chuna   

  1. a.School of Traffic and Transportation;b.Northwest Traffic Economin Research Center of China,Lanzhou Jiaotong University, Lanzhou 730070, China
  • Received:2011-07-21 Revised:2011-09-06 Online:2011-12-25 Published:2012-01-04

摘要: 在进行城市交通规划时,交通分配是一个关键步骤,有效路径集合的确定对随机交通分配的结果有很大影响.本文首先对基于Logit的主要交通分配算法进行了分析,指出了它们的不足;通过分析可知,有效路径集合的定义应考虑路径本身的性质及交通需求量的大小,然后根据一条路径对其它路径分配到交通流量的影响程度给出了路径影响度的定义,并依据影响度的定义及交通需求量给出了有效路径集合的定义.结合改进的dial算法设计了有效路径集合的计算方法;最后通过算例表明,基于影响度的有效路径定义是有效性的.

关键词: 交通工程, 有效路径, 影响度, 随机交通分配, Logit

Abstract: Traffic assignment is a key step of urban traffic planning, and efficient path set significantly affects stochastic user equilibrium (SUE) traffic assignment. Thereby, the main allocation algorithms of the Logit model are analyzed and some disadvantages of them are point out. The conception of efficient path set should consider the paths character and traffic demand. Thus, the conception of path effect degree is defined according to the degree of one path affecting traffic volumes on other paths, and the conception of efficient path set is proposed considering the traffic demand. Moreover, efficient path set searching method is designed by combining the improved Dial algorithm. At last, a numerical example is given and the results verify the efficiency of efficient path set conception.

Key words: traffic engineering, efficient paths, effect degree, stochastic traffic assignment, Logit

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