The department may mark the highways with the names or numbers that are selected for use as identification of the highways by the states through which the interstate routes pass.
S.D. Codified Laws § 31-7-9
Marking of highways
Source: SL 1955, ch 104, § 4; SDC Supp 1960, § 28.0234; SL 2010, ch 145, § 56.
Official source: South Dakota Legislature. Reproduced from public-domain South Dakota statutes; confirm against the official source for the current text. Not legal advice.