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, ...

If you're comfortable with the present green, amber, and red traffic lights, be prepared to get uncomfortable. New research suggests that adding a white light will speed up traffic and improve safety ...

In the U.S., a yellow light comes up only in between the transition from green to red. That's not the case in several parts ...

This is where traffic-light countdown timers help. They are digital displays that show the number of seconds remaining before ...