S.D. Codified Laws § 32-22-9 (2026)
Except as provided by §§ 32-19-8, 32-22-8.1, 32-22-10, 32-22-11, 32-22-12.1, and 32-22-12.2, any combination of vehicles consisting of more than two units, including a truck, tractor, or towing vehicle, may not operate on a public highway. A violation of this section is a Class 2 misdemeanor.
Source: SDC 1939, § 44.0336 (2) (d) as added by SL 1947, ch 192 ; SL 1955, ch 173 ; SL 1959, ch 260 , § 1; SL 1963, ch 258 , § 2; SL 1964, ch 124 ; SL 1981, ch 245 , § 1; SL 1982, ch 243 , § 1; SL 1982, ch 244 , § 1; SL 1984, ch 230 , § 12; SL 1989, ch 264 , § 17; SL 1997, ch 193 , § 2.