1. Travel Demand Forecasting: Mode Choice
CE331 Transportation Engineering

2. Overall Procedure Land Use and Socio-economic Projections
Trip Generation
Trip Distribution
Modal Split
Traffic Assignment
Transportation System Specifications
Direct User Impacts

3. Mode Choice What mode to use? Input Output
Choice may vary with destination, mode availability
Input
OD matrix (trip interchange between zones)
Characteristics of competing modes (e.g., auto, transit)
Output
OD matrix by mode

4. Logit Model
Pr(i): probability of choosing alternative (mode) i over all other alternatives (modes);
Ui: utility value of alternative (mode) i.