S.D. Codified Laws § 31-28-6
Current with legislation signed by the governor on or before 3/6/2024
The public board or officer whose duty it is to repair or maintain any public highway shall erect and maintain at points in conformity with standard uniform traffic control practices on each side of any sharp turn, blind crossing, or other point of danger on such highway, except railway crossings marked as required in § 31-28-7, a substantial and conspicuous warning sign. The sign shall be on the right-hand side of the highway approaching such point of danger. Failure to comply with the provisions of this section is a Class 1 misdemeanor.
SDCL 31-28-6