Louisiana Revised Statutes Tit. 32, § 319. Signal lamps and signal devices

A. Any vehicle may be equipped and when required under this chapter, shall be equipped with a stop lamp or lamps on the rear of the vehicle which shall display a red light, visible from a distance of not less than 300 feet to the rear in normal sunlight, and which shall be actuated upon application of the service (foot) brake, and which may, but need not be, incorporated with one or more other rear lamps.

B. Any vehicle may be equipped and when required under R.S. 32:306(B) shall be equipped with electric turn signals which shall indicate an intention to turn by flashing lights showing to the front and rear of a vehicle or on a combination of vehicles, on the side of the vehicle or combination toward which the turn is to be made. The lamps showing to the front shall be mounted on the same level and as widely spaced laterally as practicable and, when signaling, shall emit amber light, provided that on any vehicle manufactured prior to January 1, 1969, the lamps showing to the front may emit white or amber light, or any shade of light between white and amber. The lamps showing to the rear shall be mounted on the same level and as widely spaced laterally as practicable, and, when signaling, shall emit a red or amber light, or any shade of color between red and amber. Turn signal lamps on vehicles 80 inches or more in overall width shall be visible from a distance of not less than 500 feet to the front and rear in normal sunlight. Turn signal lamps on vehicles less than 80 inches wide shall be visible at a distance of not less than 300 feet to the front and rear in normal sunlight. Turn signal lamps may, but need not be, incorporated in other lamps on the vehicle.

C. A truck-tractor need not be equipped with turn signal lamps mounted on the rear provided the turn signal lamps mounted at or near the front are double-faced and so located as to be visible both to the front and to the rear from a distance of not less than 500 feet in normal sunlight.