[Code of Federal Regulations]
[Title 23, Volume 1]
[Revised as of April 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 23CFR470.105]

[Page 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. 470.105  Urban area boundaries and highway functional classification.

    (a) Urban area boundaries. Routes on the Federal-aid highway systems 
may be designated in both rural and urban areas. Guidance for 
determining the boundaries of urbanized and nonurbanized urban areas is 
provided in the ``Federal-Aid Policy Guide,'' Chapter 4 [G 4063.0], 
dated December 9, 1991. \1\
---------------------------------------------------------------------------

    \1\ The ``Federal-aid Policy Guide'' is available for inspection and 
copying as prescribed in 49 CFR part 7, Appendix D.
---------------------------------------------------------------------------

    (b) Highway Functional Classification. (1) The State transportation 
agency shall have the primary responsibility for developing and updating 
a statewide highway functional classification in rural and urban areas 
to determine functional usage of the existing roads and streets. 
Guidance criteria and procedures are provided in the FHWA publication 
``Highway Functional Classification--Concepts, Criteria and 
Procedures.'' \2\ The State shall cooperate with responsible local 
officials, or appropriate Federal agency in the case of areas under 
Federal jurisdiction, in developing and updating the functional 
classification.
---------------------------------------------------------------------------

    \2\ This publication, revised in March 1989, is available on request 
to the FHWA, Office of Environment and Planning, HEP-10, 400 Seventh 
Street, SW., Washington, DC 20590.
---------------------------------------------------------------------------

    (2) The results of the functional classification shall be mapped and 
submitted to the Federal Highway Administration (FHWA) for approval and 
when approved shall serve as the official record for Federal-aid 
highways and the basis for designation of the National Highway System.