THIS STUDY WILL PROVIDE THE U.S. DEPARTMENT OF TRANSPORTATION OFFICIALS WITH AN OVERVIEW OF THE SCIENTIFIC CONSENSUS ON CLIMATE CHANGE; SUMMARIZE CURRENT AND PROJECTED CONTRIBUTIONS OF ALL MODES OF U.S. TRANSPORTATION TO CLIMATE CHANGE; SUMMARIZE POSSIBLE CONSEQUENCES FOR U.S. TRANSPORTATION INFRASTRUCTURE; ANALYZE TRANSPORTATION POLICY OPTIONS FOR ADAPTING TO IMPACTS; EXAMINE STRATEGIES TO MITIGATE FUTURE CLIMATE IMPACTS THROUGH REDUCED TRANSPORTATION EMISSIONS; AND RECOMMEND CRITICAL AREAS OF RESEARCH. THE PROJECT WILL ORGANIZE AND HOLD A MAJOR CONFERENCE WITH INVITED PAPERS, WHICH WILL BE INPUTS TO THE COMMITTEE S DELIBERATIONS.