Modal Split Model Considering Carpool Mode

Modal split remains a primary concern of transportation planners as the state-of-the-art has developed from diversion curves to behavioral models. The approach taken here is to formulate the mode-choice decision for the work trip as a linear combination of real and perceived characteristics of the modes considered. The logit formulation is used with three modes being considered,i.e., two automobile modes (drive-alone and carpool) and a public transit mode (bus). The final model provides insight to what factors are important in travel decisions among these three modes and the importance of examining traveler's perceptions of the differences among modes relative to actual measureable differences.