SDCL § 32-14-12: Certain maintenance vehicles exempt from overwidth restrictions.

The provisions of §§ 32-22-2 and 32-22-3 do not apply to any road grader, snowplow, or snow removal equipment which does not exceed a width of thirteen feet and ten inches and which is being operated under contract to, or leased by, the state, a county, a township, municipality, or a school district, or which is being operated within the corporate limits of a municipality. Any such equipment shall be equipped with revolving lights and any overwidth item shall be equipped with red or orange flags. Such equipment may not operate during nighttime hours except when used for snow removal purposes.