有偏好的交通网络路径选择模型

在城市交通网络中,已知路径的时间属性与费用属性,分析了出行者对路径有、无主观偏好时的路径选择问题。当无偏好时,利用信息熵理论和多属性综合决策方法给出了获得路径综合属性值的计算模型;当有偏好时,对不同的路径通过互反判断矩阵给出主观偏好,然后利用互反判断矩阵之间的偏差建立关于属性权重向量的优化模型,并采用解析的方法对模型进行求解,得到每个属性的权重,从而进一步计算出每条路径的综合属性值,属性值最大的路径为最优路径。分析结果表明:在无偏好时最佳选择路径2的综合属性值为0.918;在有偏好时最佳选择路径4的综合属性值为0.965,与无偏好的相差较大,且6条路径的选择次序不同。可见,出行者的主观偏好对路径选择结果有较大的影响。

Route choice model with preferences in traffic network

In urban traffic network,when the attributes of times and costs for paths were confirmed,the path selection problems with the preferences of travelers or not were analyzed.When there were no preferences,the integrated attribute value of each path was obtained by using the information entropy theory and the multi-attribute synthetic decision method.When the preferences for different paths were given by using the reciprocal judgment matrixes,for obtaining the weight of each attribute,an optimal model of weight vectors was set up to minimize the deviations between the reciprocal judgment matrixes.The model was solved by the analytic method,the attribute weights were used to calculate the integrated values of the paths,and the path with the maximum was the optimal.Analysis result shows that for the no preference problem,path 2 is the optimal with the integrated value 0.918.Otherwise,for the preference problem,path 4 is the optimal with the integrated value 0.965.Under the two conditions,the orders of six chosen paths are different.So,the preferences of travelers have obvious effect on route choice.3 tabs,1 fig,13 refs.