NHTSA Plans to Revisit U.S. Headlight Rules Amid Growing Glare Concerns

Drivers who find modern headlights painfully bright may eventually see relief. The National Highway Traffic Safety Administration announced this week that it intends to update vehicle-lighting requirements under Federal Motor Vehicle Safety Standard No. 108.

The announcement does not mean that new headlight requirements take effect immediately or establish a confirmed deadline for vehicles to change. It signals that federal regulators are preparing to reconsider rules that have not been updated in roughly 25 years.

Why the headlight rules are being reconsidered

Vehicle lighting has changed substantially since the current framework was developed. LEDs are now common, automatic high beams are increasingly available, and newer systems can selectively adjust a headlight beam in response to surrounding traffic.

U.S. regulations, however, have not fully kept pace with those technologies. According to NHTSA’s announcement, the planned work will examine whether existing rules limit the use of newer lighting systems that could improve visibility while reducing glare.

The agency also intends to consider how several design factors affect what other drivers see:

• Headlamp height
• Headlamp aim
• LED lighting systems
• Dusk sensors
• Automatic high beams
• Replaceable light sources
• Adaptive driving beams

That list matters because glare is not necessarily caused by brightness alone. The position and aim of a headlamp can influence how directly its light reaches another driver’s eyes. NHTSA is therefore examining the broader lighting system rather than focusing only on the type of bulb or light-emitting technology used.

What adaptive driving beams do

Adaptive driving beams are designed to preserve the visibility advantages of high beams without shining the full beam into the eyes of other road users.

A vehicle equipped with the system can keep its high beams active while selectively dimming parts of the beam around an approaching vehicle or another vehicle ahead. The surrounding road remains illuminated, but the area occupied by another driver is treated differently.

U.S. companies have been permitted to use adaptive driving beams since 2022. The source material notes, however, that the U.S. implementation does not follow the same standards used in Europe.

The planned review could help establish rules that make it easier for automakers to deploy these systems consistently. Whether that leads to better real-world performance will depend on the final requirements and testing methods.

A technical group will examine height and aim

Transportation Secretary Sean Duffy will appoint as many as 18 industry representatives, safety advocates, and technical experts to study the issue. Their work will include evaluating how headlamp height and aim affect driver visibility.

That approach reflects a practical problem with treating all glare complaints as the same. A low-mounted lamp, a high-mounted lamp, a misaligned lamp, and an adaptive system may create different visibility conditions. A regulation that addresses only LED output, for example, might not resolve glare associated with vehicle geometry or aiming.

The group’s findings are intended to support updates to Standard No. 108 and help bring U.S. vehicle-lighting rules closer to international standards. The announcement does not specify the final technical requirements or say when any revised rules would become mandatory.

Some vehicles already use the technology

The proposed changes would not introduce adaptive lighting from scratch. Some vehicles already use systems that can alter the high-beam pattern.

The source material identifies Rivian’s second-generation R1T and R1S as vehicles that already use this type of lighting. It also says Audi plans to introduce the technology on its 2027 Q9 flagship SUV.

Those examples illustrate why regulatory modernization is being considered: manufacturers have developed lighting systems that existing rules may not fully accommodate, while regulators are still determining how those systems should be evaluated.

What the announcement means for drivers

For people frustrated by headlight glare, the announcement is a potential long-term improvement rather than an immediate fix.

Drivers should not expect instant changes

Until NHTSA completes its work and adopts new rules, existing vehicles will continue operating under the current framework. The announcement provides no confirmed schedule for when revised standards would affect newly manufactured vehicles.

New systems may reduce some glare, not eliminate every problem

Adaptive driving beams could reduce direct glare in situations where the system correctly identifies another vehicle and adjusts the beam. They cannot guarantee that every lighting problem disappears.

The review’s focus on headlamp height and aim also suggests that glare has multiple possible causes. Even under updated standards, not every source of glare would necessarily be eliminated.

What to watch next

The key developments will be the expert group’s recommendations, any formal proposal from NHTSA, and the technical details of the revised lighting requirements. The most consequential questions include:

• How will adaptive driving beams be tested?
• What limits will apply to glare from different headlamp heights?
• How will regulators measure headlamp aim?
• Will the rules distinguish between LED systems and other replaceable light sources?
• When would any new requirements apply to vehicles already on the road versus newly manufactured vehicles?

Until those questions are answered, the announcement should be understood as the beginning of a standards review—not as a final decision that all bright headlights will soon be prohibited or redesigned.

A modernized standard could give automakers more room to use advanced lighting while addressing glare more directly. Whether it produces a noticeable improvement for drivers will depend on the final rules and how effectively they control the factors NHTSA is now examining.

Sources

• CNET, published October 9, 2026: https://www.cnet.com/roadshow/nhtsa-regulation-bright-headlights/