Federal Motor Vehicle Safety Standard 108 (FMVSS 108) regulates all automotive lighting, signalling and reflective devices in the United States.
[11]: Table I In February 2022, FMVSS 108 was amended to allow automakers to install adaptive driver beam (ADB) headlamps on new vehicles.
Some manufacturers have reportedly engineered headlamps to have a dark spot where they are measured according to the regulation while being over-illuminated in the rest of the field.
Retroreflective material fitted to a heavy motor vehicle in New Zealand manufactured on or after 1st Jan 2006 must comply with either UNECE Regulation 104 or FMVSS 108.
In order to show compliance to FMVSS 108, the lens of each original equipment and replacement headlamp, daytime running lamp (DRL) and certain conspicuity reflectors must be marked with the symbol "DOT".