23 U.S.C. 106, 109, 112, 115, 315, 320, and 402(a); Sec. 1303 of Pub. L. 112-141, 126 Stat. 405; Sec. 1501 and 1503 of Pub. L. 109-59, 119 Stat. 1144; Pub. L. 105-178, 112 Stat. 193; Pub. L. 104-59, 109 Stat. 582; Pub. L. 97-424, 96 Stat. 2106; Pub. L. 90-495, 82 Stat. 828; Pub. L. 85-767, 72 Stat. 896; Pub. L. 84-627, 70 Stat. 380; 23 CFR 1.32 and 49 CFR 1.85.