70:04:03:06Location

and spacing of directional signs. Directional signs must be located and spaced as follows: (1) Signs must be located a minimum of 2,000 feet from an interchange or intersection at-grade along the interstate system and a minimum of 1,000 feet from an interchange or intersection at-grade along the primary system, measured from the nearest point of the beginning or ending of pavement widening at the exit from or entrance to the main-traveled way; (2) Signs must be located a minimum of 2,000 feet from rest areas, parklands, or scenic areas, measured from the boundary line at its intersection with the right-of-way line; (3) Two directional signs facing the same direction of travel must be located a minimum of one mile apart; (4) A maximum of three directional signs pertaining to the same site and facing the same direction of travel may be located along a single route approaching the site; (5) Signs located adjacent to the interstate system must be within 75 air miles of the site; and (6) Signs located adjacent to the primary system must be within 50 air miles of the site.

Source: 6 SDR 99, effective April 13, 1980; transferred from § 70:01:06.03:06, effective November 1, 1986; 13 SDR 129, 13 SDR 134, effective July 1, 1987.