If you’ve seen talk about a white traffic light or images of a signal with an unfamiliar fourth color, you’re not imagining it. With everything drivers already pay attention to at intersections, ...

At first glance, traffic lights are stunningly simple: green means go, red means stop, and yellow means it’s about to turn red. But like cars, phones, and just about everything else on this planet, ...

Garrett Morgan patented a traffic signal in 1923, but Detroit cop William Potts brought the three-light traffic signal to ...

The traffic light in Syracuse, N.Y.'s Tipperary Hill has the green light on top. Irish residents thought red on top ...