(A) Whenever the Mayor and Council shall have determined on the basis of an engineering and traffic investigation that the maximum speed imposed by this chapter is greater or less than is reasonable and safe under the conditions found to exist upon a highway or part of a highway, the Mayor and Council may determine and declare a reasonable and safe maximum limit thereon which:
(1) Decreases the limit at intersections;
(2) Increases the limit within an urban district, but not to more than 55 mph; or
(3) Decreases the limit outside an urban district, but not to less than 35 mph.
(B) Any alteration of the maximum limits on state highways or extensions thereof in the town, under the provisions of this chapter, shall not be effective until such alteration has been approved by the SCDOT.
(C) Any altered limit established, as authorized by this chapter, shall be effective at all times, when appropriate signs giving notice thereof have been erected.
Statutory reference:
Authority to alter speed limits, see S.C. Code § 56-5-1540