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, ...

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

What do you think of a fourth traffic light color being added to traffic signals for self-driving vehicles to help control traffic flow? I get that one day a bunch of connected autonomous cars may ...