[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR470.101] [Page 117] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 470_HIGHWAY SYSTEMS--Table of Contents Subpart A_Federal-aid Highway Systems Sec. 470.101 Purpose. Subpart A_Federal-aid Highway Systems Sec. 470.101 Purpose. 470.103 Definitions. 470.105 Urban area boundaries and highway functional classification. 470.107 Federal-aid highway systems. 470.109 System procedures--General. 470.111 Interstate System procedures. 470.113 National Highway System procedures. 470.115 Approval authority. Appendix A to Subpart A of Part 470--Guidance Criteria for Evaluating Requests for Interstate System Designations under 23 U.S.C. 139 (a) and (b). Appendix B to Subpart A of Part 470--Designation of Segments of Section 332(a)(2) Corridors as Parts of the Interstate System. Appendix C to Subpart A of Part 470--Policy for the Signing and Numbering of Future Interstate Corridors Designated by Section 332 of the NHS Designation Act of 1995 or Designated Under 23 U.S.C. 139(b). Appendix D to Subpart A of Part 470--Guidance Criteria for Evaluating Requests for Modifications to the National Highway System. Subparts B-C [Reserved] Authority: Authority: 23 U.S.C. 103(b)(2), 103 (e)(1), (e)(2), and (e)(3), 103(f), 134, 135, and 315; and 49 CFR 1.48(b)(2). Source: 40 FR 42344, Sept. 12, 1975, unless otherwise noted. Redesignated at 41 FR 51396, Nov. 22, 1976. Source: 62 FR 33355, June 19, 1997, unless otherwise noted. This part sets forth policies and procedures relating to the identification of Federal-aid highways, the functional classification of roads and streets, the designation of urban area boundaries, and the designation of routes on the Federal-aid highway systems. [[Page 118]]