Engineers are exploring a future white phase on U.S. traffic lights, showing how autonomous vehicles could coordinate movement at intersections.

You notice changes to traffic lights can affect everyone on the road — especially when visibility becomes unreliable in winter weather or when new signal colors try to share space with long-standing ...

The first tri-color traffic signal that was invented and used in Detroit. (The Henry Ford.) On this day in 1920, the way people drove was changed forever when a Detroit traffic cop installed a ...