BEHAVIORAL DEMAND MODELING AND VALUATION OF TRAVEL TIME. STRUCTURE OF DISAGGREGATE MODELS

In examining the structure of travel demand models this workshop had the following two tasks: identification of areas where more research is needed and the giving of specific directions to research in these areas. Seven topics for research were identified: (1) fundamental theoretical work to extend established theories of consumer behavior to travel demand and travel choice; (2) the identification of the behavioral structure on which the statistical choice models are based; (3) the choice of simultaneous or sequential models; (4) the problem of the supply side of transportation; (5) the problem of equilibration (assignment) of demand and supply; (6) the need for a more thorough understanding of the relations between travel-related decisions such as automobile ownership and household location on the one hand and trip-making decisions on the other; and (7) the modeling of travel and related behaviour over time. This report also includes comments on the specification of variables in these models and on practical applications of the new models.