25.13 Identification Lamps. All buses, trucks, and truck-tractors 80 inches wide or wider must be equipped with three (3)
identification lamps of amber color mounted on the cab of the ve
hicle, one (1) as close to the
vertical center line of the vehi
cle as
practicable and one (1) on each side of the center line, not less than 6 inches or more than 12 inches.
If your vehicle has dual wheels, it probably is 80" wide.
