Abstract
A comprehensive travel demand modeling framework is proposed to identify and model the urban development decisions of firms and the mobility, activity, and travel decisions of individuals and households. The framework is also used to develop a system of models that can be used by decisionmakers and planners to evaluate the effects of developments in information technologies and changes in the transportation system. The implementation of an operational model system based on this framework is envisioned as an incremental process starting with the current best practice of disaggregate travel demand model systems. To this end, an activity-based model system is presented as the first stage in the development of an operational model system.