The advent of self-driving cars could lead to a number of changes to traffic laws down the road, including a possible fourth traffic signal, researchers say. On top of the ubiquitous red, yellow and ...

Adding a fourth light to traffic signals -- in addition to red, green and yellow -- would shorten wait times at street corners for pedestrians, as well as improve traffic flow for both autonomous ...

Add Yahoo as a preferred source to see more of our stories on Google. Traffic light on yellow with sky and trees in background. - Ktsimage/Getty Images Ah, the yellow light. You know, that signal that ...

New research shows that AI in cars might warrant a new, four-light traffic signal that is more efficient. Getty Images/iStockphoto Surely this will complicate the game of red light, green light.

The idea of a fourth traffic light has gone viral online, with several reports claiming that a white signal will soon join the familiar red, amber and green at road intersections. The reason, ...

Some things are so ubiquitous that it's easy to forget they're designed for a reason. With more than 300,000 traffic lights set up across the United States, it's easy to take how they look for granted ...

Cars that drive themselves are no longer just a concept you'd see in sci-fi movies imagining the near future. Companies like Waymo are already using self-driving cars, and you can ride in a robotaxi ...

Red and green traffic lights have been around since the 1800s, when British traffic officers used to rotate gas lamps that burned red and green to control the movement of mostly horse-drawn vehicles.

Ah, the yellow light. You know, that signal that is supposed to let you know to slow down as you approach the intersection, but makes you speed up instead? You probably take it for granted, but ...