Lamps & Reflective Devices

DOT regulations govern the use of operation of lamps and reflective devices on commercial motor vehicles (CMVs). The regulations address the type of motor vehicle lamps and devices that must be used, how the devices must be secured and operated, how conspicuous the devices must appear, and what kinds of devices may (and may not) be used in combination with other devices.

General Use and Securement Requirements

In general, CMVs must be equipped with the following motor vehicle lamps and reflectors:
  • Headlamps;
  • Turn signals;
  • Identification lamps;
  • Tail lamps,
  • Stop lamps;
  • Clearance lamps;
  • License plate lamps;
  • Side marker lamps;
  • Vehicular hazard warning signal flasher lamps;
  • Backup lamps;
  • Parking lamps; and
  • Reflex reflectors.

All lamps must be securely mounted on a rigid part of the vehicle.  

All lamps must be securely mounted on a rigid part of the vehicle.


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