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Title 23 of the United States Code is a positive law title of the United States Code with the heading "Highways."

• 23 U.S.C. ch. 1—Federal-Aid Highways
• 23 U.S.C. ch. 2—Other Highways
• 23 U.S.C. ch. 3—General Provisions
• 23 U.S.C. ch. 4—Highway Safety
• 23 U.S.C. ch. 5—Research And Technology

• Title 23 of the Code of Federal Regulations

• U.S. Code Title 23, via United States Government Printing Office
• U.S. Code Title 23, via Cornell University