关键词: 效用理论, MNL模型, 特性变量, 客运分担率

Abstract: Based on the theory of disaggregate discrete choice and characteristics of different transportation mode in transportation corridor，the selection principle of utility function explanation variables of MNL model was determined． According to the selection principle，relationship among travel mode split influencing factors such as travel time，safety，comfort，convenience， cost and adaptability of these factors as characteristic variables were analyzed in the paper; travel time，departure frequency and relative cost ( cost divide by income) should be considered as characteristic variables when forecasting transportation corridor mode split by MNL model; meanwhile，corresponding calibration method was given． According to travel mode split data，empirical analysis and sensibility of the characteristic variables analysis were carried out by MNL model． The parameters indicated that the influence of travel time，cost and change of income should be taken into consideration while making operation strategies of passenger dedicate line．

Key words: utility theory, MNL model, characteristic variables, mode split