§ 393.11 Lighting devices and reflectors.

The following Table 1 sets forth the required color, position, and required lighting devices by type of commercial motor vehicle. Diagrams illustrating the locations of lighting devices and reflectors, by type and size of commercial motor vehicle, are shown immediately following Table 1. All lighting devices on motor vehicles placed in operation after March 7, 1989, must meet the requirements of 49 CFR 571.108 in effect at the time of manufacture of the vehicle. Motor vehicles placed in operation on or before March 7, 1989, must meet either the requirements of this subchapter or part 571 of this title in effect at the time of manufacture.

Footnote—1

Identification lamps may be mounted on the vertical centerline of the cab where different from the centerline of the vehicle, except where the cab is not more than 42 inches wide at the front roofline, then a single lamp at the center of the cab shall be deemed to comply with the requirements for identification lamps. No part of the identification lamps or their mountings may extend below the top of the vehicle windshield.

Footnote—2

Unless the turn signals on the front are so constructed (double-faced) and located as to be visible to passing drivers, two turn signals are required on the rear of the truck tractor, one at each side as far apart as practicable.

Footnote—3

The identification lamps need not be visible or lighted if obscured by a vehicle in the same combination.

Footnote—4

Any semitrailer or full trailer vehicles manufactured on and after March 1, 1979, shall be equipped with rear side-marker lamps at a height of not less than 15 inches (381 mm) nor more than 60 inches (1524 mm) above the road surface, as measured from the center of the lamp on the vehicle at curb weight. The rear side marker lamps shall be visible in the vehicle's rearview mirrors when the trailer is tracking straight.

Footnote—5

For purposes of these regulations, each converter dolly shall be equipped with one stop lamp, one tail lamp, and two reflectors on the rear at each side when towed singly by another vehicle. Each converter dolly shall be equipped with turn signals at the rear if the converter dolly obscures the turn signals at the rear of the towing vehicle when towed singly by another vehicle.

Footnote—6

Pole trailers will have two reflectors, one on each side, placed to indicate extreme width of the trailer.

Footnote—7

Pole trailers may have three identification lamps mounted on the vertical centerline of the rear of the cab of the truck tractor drawing the pole trailer, and higher than the load being transported, in lieu of the three identification lamps mounted on the rear vertical centerline of the trailer.

Footnote—8

Pole trailers shall have on the rearmost support for the load, one combination marker lamp or two single lamps showing amber to the front and red to the rear and side, mounted on each side to indicate maximum width of the pole trailer; and one red reflector on each side of the rearmost support for the load.

Footnote—9

Any motor vehicle transporting a load which extends more than 4 inches beyond the width of the motor vehicle, or having projections beyond the rear of such vehicles, shall be equipped with the following lamps in addition to other required lamps, have the loads marked

Loads projecting more than 4 inches beyond sides of motor vehicles:

(1) The foremost edge of the projecting load at its outermost extremity shall be marked with an amber lamp visible from the front and both sides.

(2) The rearmost edge of the projecting load at its outermost extremity shall be marked with a red lamp visible from the rear and side.

(3) If any portion of the projecting load extends beyond both the foremost and rearmost edge, it shall be marked with an amber lamp visible from the front, both sides, and rear.

(4) If the protecting load does not measure more than 3 feet from front to rear, it shall be marked with an amber lamp visible from the front, both sides, and rear, except that if the projection is located at or near the rear it shall be marked by a red lamp visible from front, side, and rear.

Footnote—10

Projections beyond rear of motor vehicles. Motor vehicles transporting loads which extend more than 4 feet beyond the rear of the motor vehicle, or which have these tailboards or tailgates extending more than 4 feet beyond the body, shall have projections marked as follows:

(1) On each side of the projecting load, one red lamp, visible from the side, located so as to indicate maximum overhang.

(2) On the rear of the projecting load, two red lamps, visible from the rear, one at each side; and two red reflectors visible from the rear, one at each side, located so as to indicate maximum width.

Footnote—11

To be illuminated when tractor headlamps are illuminated.

Footnote—12

Every bus, truck, and truck tractor shall be equipped with a signaling system that, in addition to signaling turning movements, shall have a switch or combination of switches that will cause the two front turn signals and the two rear signals to flash simultaneously as a vehicular traffic signal warning, required by § 392-22(a). The system shall be capable of flashing simultaneously with the ignition of the vehicle on or off.

Footnote—13

To be actuated upon application of service brakes.

Footnote—14

Backup lamp required to operate when bus, truck, or truck tractor is in reverse.

Footnote—15

When the rear identification lamps are mounted at the extreme height of a vehicle, rear clearance lamps need not meet the requirement that they be located as close as practicable to the top of the vehicle.

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Legend (Used in Illustrations)

1. Headlamps (2)-White (4 optional)

2. Side-marker lamps. Front (2)-Amber

3. Side reflectors. Front (2)-Amber

4. Turn-signal lamps. Front (2)-Amber

4a. Turn-signal lamps. Front (2)-Amber (Optional location)

5. Identification lamps. Front (3)-Amber

5a. Identification lamps. Front (3)-Amber (Optional location)

6. Clearance lamps. Front (2)-Amber

7. Side-marker lamps. Rear (2)-Red

8. Side-reflectors. Rear (2)-Red

9. Identification lamps. Rear (3)-Red

10. Clearance lamps. Rear (2)-Red

11. Reflectors Rear (2)-Red

12. Stop lamps. Rear (2)-Red

13. License plate lamp. Rear (1)-White

14. Backup lamp. Rear (1)-White (location optional provided optional requirements are met)

15. Side-marker lamps. Intermediate (2)-Amber (if vehicle is 30′ or more overall length)

16. Side reflectors. Intermediate (2)-Amber (if vehicle is 30′ or more overall length)

17. Turn signal lamps. Rear (2)-Amber or Red

18. Tail lamps. Rear (2)-Red

19. Parking lamps. Front 2-Amber or White

[53 FR 49385, Dec. 7, 1988]