SDCL § 32-26-18: Left-turning vehicle--Manner of making turn--Violation as misdemeanor.

The driver of a vehicle intending to turn left shall approach the turn in the extreme left-hand lane lawfully available to traffic moving in the direction of travel of the vehicle. If practicable, the left turn shall be made to the left of the center of the intersection and so as to leave the intersection or other location in the extreme left-hand lane lawfully available to traffic moving in the same direction as the vehicle on the roadway being entered. A violation of this section is a Class 2 misdemeanor.