Abstract:The development of modeling systems for activity-based demand ushers in a new era in transportation demand forecasting and planning. A comprehensive multimodal activity-based system for forecasting travel demand was developed for implementation in Florida and resulted in the Florida Activity Mobility Simulator (FAMOS). Two main modules compose the FAMOS microsimulation model system for modeling activity—travel patterns of individuals: the Household Attributes Generation System and the Prism-Constrained Activity—Travel Simulator. FAMOS was developed and estimated with household activity and travel data collected in southeast Florida in 2000. Results of the model development effort are promising and demonstrate the applicability of activity-based model system in travel demand forecasting. An overview of the model system, a description of its features and capabilities, and preliminary validation results are provided.