New Advancements in Activity-Based Models

Abstract

Activity-Based models have been used in practice for more than a decade in the United States. Within the last year, a number of significant advances have been designed, developed and put into practice in Activity-Based Models to support a wide range of system level and individual project planning efforts. In San Diego, all location choices are now based upon a very fine level of spatial resolution that allows for improvements in understanding access and egress to public transport, better representation of non-motorized travel, and incorporation of explanatory variables that explicitly respond to transit-oriented development strategies and related plans. In the Phoenix, there is now an explicit modelling of seasonality that distinguishes changes in travel demand behaviour between the summer and winter seasons. New submodels have also been developed to address the university-related travel segment for Arizona State University. The Phoenix Activity-Based models include modules that model the 6 % of all regional households that are owned by seasonal residents. Additionally, Special event models have been developed for sporting and cultural venues which comprise a growing proportion of public transport ridership. Other notable advancements in our Activity-Based models have been the modelling of travel time reliability as a function of perceived highway time and congestion levels, and the inclusion of parking choice and constrained parking equilibrium models in congested Central Business districts. The paper will describe the basic structure, implementation, and application of these new advancements.

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