TIME USE AND TRAVEL DEMAND MODELING: RECENT DEVELOPMENTS AND CURRENT CHALLENGES. IN: IN PERPETUAL MOTION: TRAVEL BEHAVIOR RESEARCH OPPORTUNITIES AND APPLICATION CHALLENGES

This paper examines 2 recent and continuing trends in research and application at the interface between time use studies and travel demand modeling; namely, the utilization of time use diaries in collecting data about activity participation and the related travel behavior, and the development of models of time allocation to activities, activity duration, and travel behavior. These recent and ongoing developments in travel demand modeling are placed in proper historical context, and the utilization of time use diaries in travel demand analysis and modeling is explored, including an examination of the experiences in recent travel behavior surveys in a number of metropolitan areas in the U.S. Recent and current efforts to develop time allocation and duration models, sometimes in conjunction with travel behavior models, are discussed. The modeling efforts examined here utilize a variety of methodologies, including structural equation models, hazard-based duration models, and utility maximization models. The paper concludes by identifying some areas of time use studies which present new challenges for travel demand researchers.