Someone Decided
The Line That Vanishes in the Rain
22:07
Road lines glow at night because they are full of tiny glass beads, and each one sends your headlights back toward you. On a wet night, water floods those beads and the line all but disappears. In a 2009 night-time test in Texas, drivers often never saw an ordinary line in simulated rain. The US now has a federal minimum for how bright lane lines must be. Agencies had until September 2026 to…