[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR470.101] [Page 119-120] 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. 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, [[Page 120]] and the designation of routes on the Federal-aid highway systems.