S.D. Codified Laws § 31-4-14 (2026)
All marking, surveying, construction, repairing, and maintenance of the state trunk highway system is under the control and supervision of the department. The department shall administer the laws relative thereto.
Source: SL 1919, ch 333 , § 51; SDC 1939, § 28.0211; SL 1957, ch 124 ; SL 1965, ch 132 ; SL 2010, ch 145 , § 23.