Code of Federal Regulations > Title 23 > Chapter I > Part 630

Regulations last checked for updates: Jan 08, 2026

Title 23 - Highways last revised: Jan 02, 2026

Subpart A [§ 630.102 - § 630.112] - Subpart A—Project Authorization and Agreements

Subpart B [§ 630.201 - § 630.205] - Subpart B—Plans, Specifications, and Estimates

Subpart C - Subpart C [Reserved]

Subpart D [§ 630.401 - § 630.404] - Subpart D—Geodetic Markers

Subpart E - Subparts E-F [Reserved]

Subpart G [§ 630.701 - § 630.709] - Subpart G—Advance Construction of Federal-Aid Projects

Subpart H - Subparts H-I [Reserved]

Subpart J [§ 630.1002 - § 630.1018] - Subpart J—Work Zone Safety and Mobility

Subpart K [§ 630.1102 - § 630.1112] - Subpart K—Temporary Traffic Control Devices

authority: 23 U.S.C. 106,109,112,115,315,and; sec. 1110, 1501, and 1503, 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; sections 1303 and 1405, Pub. L. 112-141, 126 Stat. 405; and 23 CFR 1.32 and 49 CFR 1.81 and 1.85