提出城市交通综合指数和交通出行指数的概念，并探讨了具体计算指数的数学建模。

This article present the concept of Urban Traffic Index and Travel Index, discuss the mathematic model about the Urban Traffic Index and Travel Index.

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为了选择最优路径，综合考虑出行时间、出行费用和换乘次数等因素，给出一个综合评价指数模型，并用算例对算法和模型的可行性进行验证。

In order to select optimum route, thinking about the factors which are time of transfers, cost of running and times of transfers, a compound evaluation index model is obtained.

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