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充分考虑城市轨道交通网络中影响乘客路径选择的主要因素，包括乘车时间、换乘次数和换乘时间，通过对换乘时间进行惩罚，构造了包括换乘在内的城市轨道交通网络的路径广义费用模型，基于随机效用理论分析了乘客的路径选择行为.根据最短路径费用定义OD之间的有效路径集合，同时，使用路径相对费用代替路径绝对费用，对传统Logit模型进行改进，提出基于改进Logit模型的城市轨道交通网络客流分配方法.采用基于图的遍历算法确定OD间的有效路径.最后，以2008年北京市轨道交通网络为研究对象，对模型和算法进行了分析和验证.

Improved Logit Model and Method for Urban Rail Transit Network Assignment

In this paper, the major factors (including travel time, transfer time and transfer count) that impact the passenger’s route choice in urban rail transit network are fully considered. The generalized travel cost function is formulated and then the passenger’s route choice behaviour is analyzed based on the random utility theory. A Logit based model is presented for urban rail transit network flow assignment problem. Simultaneously, a searching algorithm based on depth first method is proposed to obtain the set of effective routes between OD pair. On basis of these, the application of the model and algorithm is illustrated with Beijing rail transit network and practical data.