US Agency To Rewrite Rules To Finally Address Vehicle Headlight Glare

The National Highway Traffic Safety Administration (NHTSA) has announced plans to revise its vehicle lighting standards, according to Reuters. This move aims to tackle issues surrounding headlight glare and incorporate cutting-edge safety-enhancing lighting technologies. These improvements will apply to LED lights, dusk sensors, automatic high beams, and replaceable light sources.

In addition to addressing glare, NHTSA will also reassess headlamp height and aim to enhance driver visibility. This comes in response to the increasing number of complaints about glare from headlights, with some lawmakers advocating for a maximum headlight brightness standard. The rise in taller trucks and SUVs on the roads has exacerbated the problem, as these vehicles cast more light into the eyes of drivers.

While LED headlights now dominate new car headlights, they are significantly brighter than the traditional halogen lights they replace. Despite the issue contributing to only a small number of nighttime crashes, according to a study from the Insurance Institute for Highway Safety (IIHS), headlight glare remains a concern. The study suggested that the effect of glare is more pronounced in drivers older than 70.

Federal headlight standards for minimum and maximum brightness have remained unchanged since 1997, as noted by the IIHS. The study found that adaptive driving beam headlights, which dim the portions of the beam directed at other vehicles, have proven beneficial. These devices were approved for installation in new vehicles by NHTSA in 2022.