Federal data shows that half of all traffic fatalities happen after dark, but only one-quarter of driving occurs at night, making advanced headlight technology a welcome development. After years of debate, adaptive driving beam (A.D.B.) headlights are finally approved for American roads and rolling into new models.

For over a decade, smart headlights have steered light away from oncoming traffic while illuminating the road ahead. Using dozens of individually controlled LEDs, the system creates precise light patterns, focusing illumination farther down the road while masking glare from other drivers. The technology relies on cameras, accelerometers, steering sensors, and GPS data to adjust beams in real time.

The National Highway Traffic Safety Administration updated headlight rules in 2022, allowing adaptive lighting on U.S. roads. However, automakers have been slow to adopt the tech due to strict federal standards outlined in the 300-page FMVSS No. 108 document.

Carlos Montes, lighting systems senior manager at Rivian, noted that U.S. requirements are more demanding than European standards. Rivian now offers A.D.B. across its lineup, including the new R2 SUV. Other automakers are gradually following suit, though widespread adoption will take years to significantly impact road safety.