Includes bibliographical references.

The vast majority of the U.S. population - some 80 percent - now lives in metropolitan areas, but population and employment continue to decentralize within regions, and density levels continue to decline at the urban fringe. Suburbanization is a long-standing trend that reflects the preference of many Americans for living in detached single-family homes, made possible largely through the mobility provided by the automobile and an extensive highway network. Yet these dispersed, automobile-dependent development patterns have come at a cost, consuming vast quantities of undeveloped land; increasing the nations dependence on petroleum, particularly foreign imports; and increasing greenhouse gas (GHG) emissions that contribute to global warming. The primary purpose of this study is to examine the relationship between land development patterns, often referred to as the built environment, and motor vehicle travel in the United States and to assess whether petroleum use, and by extension GHG emissions, could be reduced through changes in the design of development patterns. A key question of interest is the extent to which developing more compactly would reduce vehicle miles traveled (VMT) and make alternative modes of travel (e.g., transit, walking) more feasible. The study is focused on metropolitan areas and on personal travel, the primary vectors through which policy changes designed to encourage more compact development should have the greatest effect. Introduction -- Trends in development patterns -- Impacts of land use patterns on vehicle miles traveled : Evidence from the literature -- Future residential development patterns -- Potential effects of more compact development patterns on vehicle miles traveled, energy use, and COb2s emissions -- Recommendations -- Appendices. A. Study on relationships among development patterns, vehicle miles traveled, and energy consumption -- B. Commissioned papers and authors -- C. Analysis of density assumptions and feasibility of committee scenarios.