Center for Activity Systems Analysis

The primary goal of activity-based models is a fundamental examination of the behavioral processes that results in revealed travel behavior. To reveal this process, a new computer program, REACT!, has been developed to collect data for a study of the determinants of travel and activity behavior in households. These data are inherently dynamic, since respondents record planned activity schedules and them update these schedules on a daily basis, fully defined in time and space. The resultant data will facilitate the identification of fundamental inter-relationships among a comprehensive range of revealed travel and activity participation variables, leading toward the identification of the critical variables, relationships and rules that govern that behavior. It is believed that an internet-based travel survey, particularly one as rich in resultant content as REACT!, will significantly reduce data collection costgs, improve data quality and quantity, and allow for continuous data collection. The purpose of this paper is to describe features of REACT! and to present preliminary results from a pilot study.