Comparative Analysis of Sequential and Simultaneous Choice Structures for Modeling Intra-Household Interactions

Intra-household interactions constitute an important aspect in modeling activity and travel-related decisions. Recognition of this importance has recently produced a growing body of research on various aspects of modeling intra-household interactions and group decision making mechanisms as well as first attempts to incorporate intra-household interactions in regional travel demand models. This paper presents an attempt to build a general framework for incorporation of intra-household interactions in the regional travel demand model. The approach distinguishes between three principal levels of intra-household interactions: 1) Coordinated principal daily pattern types, 2) Episodic joint activity and travel, 3) Intra-household allocation of maintenance activities. The adopted models are discrete choice constructs of the Generalized Extreme Value class. These models together create an analytical framework for integrative modeling of the daily activity and travel of multiple household members, taking into account their interactions.