The exemptions granted in § 93.32 to an authorized emergency vehicle shall apply only when the driver of any such vehicle while in motion sounds an audible signal by bell, siren or exhaust whistle as may be reasonably necessary and when the vehicle is equipped with at least 1 lighted lamp displaying a red light visible under normal atmospheric conditions from a distance of 500 feet to the front of the vehicle, except that an authorized emergency vehicle operated as a police vehicle need not be equipped with or display a red light visible form in front of the vehicle.
(1982 Code, Ch. 4, Art. II, § 3-4)