The Highway: All Lit Up

Drivers may not be getting any brighter, but cars are. The latest wrinkle in traffic safety is the running light.

A running light is a 21-candlepower light, attached to the grille, that turns on with the ignition. The resulting gleam warns of a car's approach not only at dawn and dusk, when headlights may be off, but also in broad daylight, when the car is in a shadow or blending with the background. Running lights were first used by Greyhound buses, which experimented in 1960 by leaving their headlights on in daylight....

Want the full story?

Subscribe Now

Subscribe
Subscribe

Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $30!   Best Deal!
    Print Magazine + Digital Edition + Subscriber-only Content on TIME.com

Learn more about the benefits of being a TIME subscriber

If you are already a subscriber sign up — registration is free!