Early traffic lights had only red and green, which unsurprisingly made intersections rather chaotic. Who invented the yellow ...

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, ...

Even though we’re long past the invention of the car and the first appearance of traffic regulations, it’s interesting to know how it all began. To think that some 100-150 years ago, people considered ...

Driverless cars are no longer things of the future. Engineers at NC State University propose adding a fourth traffic light to ...