Abstract
Explanatory variables in this model of urban residents' mode choice behaviour for the home-to-work trip are attitudinal ratings by survey respondents of descriptives attributes of modes perceived to be available to them. The model methodology is presented in three parts: individuals are clustered with respect to homogeneity of their choice constraints; the covariance structure of attitudinal variables is characterized through development of latent factors describing respondents' perceptions of choice alternatives; and logit probabilistic choice models are estimated in terms of subsets of descriptive attribute ratings chosen to represent latent perception factors.