This study pools household travel and built environment data from 15 diverse US regions to
produce travel models with more external validity than any to date. It uses a large number of …

Problem: Localities and states are turning to land planning and urban design for help in
reducing automobile use and related social and environmental costs. The effects of such …

Planners and researchers increasingly are concerned with how residential environments
relate to auto ownership and travel. We quantified accessibility and walkability, to examine …

Previous work with data from the Boston Metropolitan Area has suggested that land use
characteristics can have measurable impacts on travel behavior such as trip linking and …

The potential to moderate travel demand through changes in the built environment is the
subject of more than 50 recent empirical studies. The majority of recent studies are …

Since information on US household expenditures was first collected, transport expenditures
have risen from the sixth-highest share of household budgets, less than 2%, in 1917 to the …

Can urban design improve the environment? If communities could be designed to reduce
automobile use, then yes. But can urban design influence travel? Surprisingly perhaps, the …

In the conventional four-step travel demand modeling process, the number of trips made by
a household is modeled in terms of household size, income, and other sociodemographic …

Activity-based travel modeling has begun to make significant progress toward a more
behavioral framework for simulating household travel behavior. A significant challenge …

Concerns over transportation energy consumption and green-household gas (GHG)
emissions have prompted a growing body of research into the influence of built environment …