S.D. Codified Laws § 31-27-12 (2026)
If a new right-of-way is necessary for the building of a subway or overhead crossing on a state or county highway, the governing body having jurisdiction over the highway shall determine when it is necessary to eliminate the dangerous crossing.
Source: SDC 1939, § 28.1104 (1); SL 1984, ch 216 , § 2; SL 1997, ch 177 , § 6.