High-tech headlights that dim themselves could be coming to US

vehicles with bright xenon lights as opposed to normal car headlights.

US auto safety regulators are moving to allow a new generation of brighter, self-dimming headlights that won’t blind other drivers on the road ahead. 

The National Highway Traffic Safety Administration is proposing to permit so-called adaptive driving beam headlights on new cars, according to an agency notice made public Oct 11. The advanced lights essentially operate as high-beam headlamps at all times while automatically dimming specific portions of the beam to cast less light on oncoming vehicles detected by sensors.