Louisiana Revised Statutes Tit. 32, § 318. Audible and visual signals on certain vehicles

A. Every authorized emergency vehicle, except privately owned vehicles belonging to members of an organized volunteer fire department or fire district shall, in addition to any other equipment and distinctive markings required by this Chapter, be equipped with a siren, exhaust whistle, or bell capable of giving an audible signal.

C. Every authorized emergency vehicle shall, in addition to any equipment and distinctive markings required by this Chapter, be equipped with signal lamps mounted as high and as widely spaced laterally as practicable, which shall be capable of displaying to the front two alternately flashing red lights located at the same level and to the rear two alternately flashing red lights located at the same level, and these lights shall have sufficient intensity to be visible at five hundred feet in normal sunlight. In lieu of the alternately flashing red lights in the front, an authorized emergency vehicle may be equipped with a large revolving red light on the roof which is discernible in all directions and which shall also have sufficient intensity to be visible at five hundred feet in normal sunlight. In lieu of the large revolving red light on the roof, authorized emergency vehicles of organized fire companies only shall be equipped with a large revolving alternating red and white light on the roof encased in a clear dome, which is discernible in all directions and which shall also have sufficient intensity to be visible at five hundred feet in normal sunlight.

D. A police vehicle when used as an authorized emergency vehicle may, but need not, be equipped with alternately flashing red lights specified herein.

E. The use of the signal equipment described herein shall impose upon drivers of other vehicles the obligation to yield the right of way and to stop as prescribed in R.S. 32:80 and 32:125.

H. Notwithstanding any provision of law to the contrary, all publicly owned fire department vehicles and all licensed ambulances may use blue-colored electric lights. The lights shall be on the rear of the vehicle and shall not exceed fifty percent of the visual lights. For purposes of this Section, the term “ambulance” shall have the meaning ascribed in R.S. 40:1131.