The Federal Government's Role in the U.S. Transportation System Open PDF Document Details Document Type Technical Report Publication Date Jan 01, 1975 Accession Number AD1118979 Entities Organizations United States Government Accountability Office Tags Communities of Interest Energy and Power Technologies Ground and Sea Platforms Human Systems DTIC Thesaurus Topics Air Traffic Control Systems Air Transportation Aviation Accidents Commerce Congress Department Of State Energy Conservation Environment Environmental Protection Freight Transportation Land Transportation Law Mass Transportation National Security Organizational Structure Rail Transportation Short Takeoff Aircraft