基于熵权的道路交通状态模糊综合评判模型  

A fuzzy comprehensive evaluation model of road traffic state based on entropy weight

作　　者：谭振超 成卫[1] 许世春 

机构地区：[1]昆明理工大学交通工程学院,云南昆明650000 [2]云南商务信息工程学校,云南昆明650000

出　　处：《交通科学与工程》2017年第3期69-74,81,共7页Journal of Transport Science and Engineering

基　　金：国家自然科学基金项目(61364019)

摘　　要：为了客观、有效地判别城市道路交通状态,在考虑敏感性、准确性及获取难度的基础上,从交叉口和路段2个角度,分别选取车辆平均延误、平均最大排队长度、平均行程速度及时间占有率4个交通参数作为评判指标,并将信息论中的熵值理论应用于道路交通状态综合评判中,建立基于熵权的道路交通状态模糊综合评判模型。该模型利用信息熵度量数据本身所提供的有效信息量来计算评判指标的权重系数,并运用加权平均法输出模型最终的状态判别结果。VISSIM仿真结果表明:基于熵权的道路交通状态模糊综合评判模型能够较好地判别道路交通状态,其评判结果比层次分析法的更趋于实际情况,结果相对客观可信。In o rdrr to objectively and effectively assess urban road traffic s ta te , on thebasis of considering sensitivity , accuracy and availability, the four traffic param eters：average vehicle delay and average m axim um queue leng t 〈 ,average t ravel speed and t i meoccupancy,are taken as the evaluation indexes from the angles of crossroads A nd the entropy theory in inform ation theory is applied to com prehensive road traffic conditions in order to set up t he fuzzy com prehensive evalua road traffic s t ate based on ent ropy weigh t . T his m odel m akes use of t he effect i ve informat i on provided by the da ta about inform a t i on ent ropy t o calculate the w eight coefficientsof the evaluation indexes,and utilizes the m o d e ls final state derived from w eightedaverage m ethod to assess the results. T he VISSIM sim ulation show s that the fuzzycom prehensive evaluation m odel of road traffic state based on entropy w eight can distinguishroad traffic s ta te ,the evaluation results of w hich are closer to the reality analytic hierarchy process （A H P ） ,and the result is relatively objective and credible.

关 键 词：交通工程 交通状态判别 熵权法 隶属度函数'莫糊综合评判 

分 类 号：U291.115[交通运输工程—交通运输规划与管理]