America's headlight regulations are finally getting a much-needed reality check. The National Highway Traffic Safety Administration says it will modernize Federal Motor Vehicle Safety Standard No. 108, the federal rule governing vehicle lighting. The NHTSA even admits it needs a “long-overdue update.” The goal is twofold: make it easier for automakers to use newer lighting technology while addressing the increasingly annoying problem of headlight glare.

If you've ever been blinded by an oncoming SUV at night, you probably won't need much convincing that something needs to change. Modern LEDs can produce far more light than the once-common halogen units. At the same time, the growing popularity of tall vehicles means those headlights can be aimed almost directly into the eyes of drivers in lower cars.

NHTSA says it will examine how modern headlighting technology contributes to glare and determine what changes are appropriate. The agency also plans to look at headlamp height and aim and how they affect visibility. In other words, it isn't simply going after bright headlights. The position and direction of those headlights are also part of the equation.

At the same time, the NHTSA wants to update the rules to keep pace with modern technology. Its review will cover LEDs, dusk sensors, automatic high beams, and replaceable light sources. The agency also wants to update testing procedures for plastic optics and replaceable lenses while exploring ways to harmonize U.S. lighting regulations with international standards.

That's particularly interesting because the U.S. has already taken steps toward allowing more sophisticated headlights. In 2022, NHTSA amended the lighting standard to permit adaptive driving beam systems. Unlike conventional automatic high beams that switch between low and high beams, headlights with adaptive beams can selectively dim portions of the beam to avoid shining directly at other road users while maintaining additional illumination elsewhere.

Yet the rules governing headlights have remained largely stuck in the past. According to the NHTSA, the current standard needs an overhaul to accommodate newer technology and address potential causes of glare. The federal requirements governing headlight standards for minimum and maximum brightness haven't fundamentally changed since 1997, according to the Insurance Institute for Highway Safety.

This creates an interesting balancing act. Headlights need to be bright enough to illuminate the road properly, but more light isn't automatically better if it blinds everyone coming the other way. The IIHS says headlight glare accounts for a relatively small share of nighttime crashes, but that doesn't mean it's irrelevant. The problem is particularly noticeable to older drivers, who are more sensitive to glare.

Rather than simply writing another set of rules behind closed doors, the NHTSA plans to use a negotiated rulemaking process. It's the first time this has happened in over a quarter of a century. Transportation Secretary Sean Duffy will appoint up to 18 representatives from lighting manufacturers, automotive equipment associations, safety organizations, research institutions, and engineering groups to help tackle the technical issues.

NHTSA is also asking the public for comments on the effort's scope and the committee's makeup. Comments and membership applications are due by November 9.

This obviously won't make every obnoxiously bright headlight disappear overnight. It's the beginning of a rulemaking process, not an immediate ban on blinding LEDs. But considering how dramatically vehicle lighting has evolved over the past few decades, bringing the regulations into the 21st century seems like a pretty good idea.

What do you think?

There's also a bigger opportunity here than simply capping overly bright headlights. If the NHTSA gets the balance right, drivers could benefit from more advanced lighting systems that illuminate more of the road without punishing everyone coming from the opposite direction. After decades of headlights evolving faster than the rules governing them, it's about time the regulations caught up.

If the NHTSA really wants to make everyone's lives easier, though, it might want to add one more item to the agenda: a rule requiring automakers to make replacement headlights cheaper. Because what's the point of saving your retinas if replacing one fancy LED unit costs more than a used car? Wishful thinking, I know.

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Extracted and lightly reformatted for readability. · Source: en