Congress created the National Surface Transportation Policy and Revenue Study Commission to examine "future surface transportation system needs, expected demographic and economic changes that will shape traffic demand, the future of the Interstate System, and the potential for expansion, upgrades, and other changes to the surface transportation system to meet the nation's needs." The Commission was directed to consult with representatives of State departments of transportation. This report is the first of six that AASHTO plans to provide to assist the Commission. It contains a comprehensive assessment of transportation needs today and in the future, and the demographic and economic changes that will shape that future.