S.C. Code Ann. § 56-5-940: Local traffic-control devices.

Subject to the limitations prescribed in Section 56-5-930, local authorities in their respective jurisdictions shall place and maintain such traffic-control devices upon highways under their jurisdiction as they may deem necessary to indicate and to carry out the provisions of this chapter or local traffic ordinances or to regulate, warn or guide traffic. All such traffic-control devices so erected by such local authorities shall conform to the State manual and specifications.