Abstract: 

This study extends the structural equations model to incorporate both revealed and stated preference data to analyze activity-based travel behavior. The model is applied to examine the relationship between activities and mode choice on the data from the first wave of the panel study conducted for the Puget Sound Regional Council. It is found that the attitude toward comfort of travel, car requirement for job, and travel time are significant predictors for the mode choice decision. Comparing alternative decision processes, the data support that the mode choice and activity choice decisions are affected by unobserved common factors, and the mode choice and the activity choice decisions are made independently. There is some evidence that the stated-preference model has the same model structure as the revealed-preference model, and the stated-preference data help improve the fit of the entire model.