SDCL § 32-22-29: Track vehicles excepted.

The provisions of §§ 32-22-27 and 32-22-28 shall not apply to traction engines or tractors, the propulsive power of which is asserted, not through wheels resting upon the ground but by means of a flexible band or chain generally known as a movable track when the portions of the movable tracks in contact with the surface of the highway present a plane surface.