[Code of Federal Regulations]
[Title 36, Volume 1]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 36CFR4.21]

[Page 37]
 
              TITLE 36--PARKS, FORESTS, AND PUBLIC PROPERTY
 
      CHAPTER I--NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR
 
PART 4--VEHICLES AND TRAFFIC SAFETY--Table of Contents
 
Sec. 4.21  Speed limits.

    (a) Park area speed limits are as follows:
    (1) 15 miles per hour: within all school zones, campgrounds, picnic 
areas, parking areas, utility areas, business or residential areas, 
other places of public assemblage and at emergency scenes.
    (2) 25 miles per hour: upon sections of park road under repair or 
construction.
    (3) 45 miles per hour: upon all other park roads.
    (b) The superintendent may designate a different speed limit upon 
any park road when a speed limit set forth in paragraph (a) of this 
section is determined to be unreasonable, unsafe or inconsistent with 
the purposes for which the park area was established. Speed limits shall 
be posted by using standard traffic control devices.
    (c) Operating a vehicle at a speed in excess of the speed limit is 
prohibited.
    (d) An authorized person may utilize radiomicrowaves or other 
electrical devices to determine the speed of a vehicle on a park road. 
Signs indicating that vehicle speed is determined by the use of 
radiomicrowaves or other electrical devices are not required.