Two conferences on Refocusing Transportation Planning for the 21st Century were held in 1999 following passage of the Transportation Equity Act for the 21st Century (TEA-21). The first conference focused on the identification of key trends, issues, and general areas of research. The results of Conference I, which produced stand-alone products, were used as input for Conference II. The second conference had the specific objective of producing research problem statements. Its mission was to review the results of the first conference by developing these statements. Conference II produced a number of detailed research statements that form the basis for the National Agenda for Transportation Planning Research. The proceedings of both conferences are presented in this report.