S.D. Codified Laws § 32-28-1
Whenever traffic is controlled by traffic control signals exhibiting the words go, caution, or stop, or exhibiting different colored lights successively one at a time, or with arrows, only the colors mentioned in §§ 32-28-2 to 32-28-5, inclusive, shall be used and said terms and lights shall indicate and apply to drivers of vehicles and pedestrians as provided by §§ 32-28-2 to 32-28-5, inclusive.
In the event an official traffic control signal is erected and maintained at a place other than an intersection, the provisions of §§ 32-28-1 to 32-28-5, inclusive, shall be applicable except as to those provisions which by their nature can have no application. Any stop required shall be made at a sign or marking on the pavement indicating where the stop shall be made, but in the absence of any such sign or marking the stop shall be made at the signal.
SDCL 32-28-1