SDCL § 32-31-4: Speed limits inapplicable--Conditions.

The speed limits set forth in §§ 32-25-1.1 to 32-25-17, inclusive, do not apply to any authorized emergency vehicle responding to an emergency call if the driver sounds an audible siren or air horn, or both, or displays flashing, oscillating, or rotating beams of red light, or combinations of red, blue, or white light, visible one hundred eighty degrees to the front of the vehicle. The lights must be capable of warning the public of the presence of an emergency vehicle under normal atmospheric conditions.

The speed limits set forth in §§ 32-25-1.1 to 32-25-17, inclusive, do not apply to authorized emergency vehicles operated by law enforcement officers who are measuring the speed of other vehicles by use of the emergency vehicle speedometer.

An ambulance operator who meets the requirements of § 34-11-12.3 may operate an ambulance in excess of the speed limit without audible signals while operating outside the city limits of a municipality.