A “white light” added to traffic signals could enable self-driving vehicles to help control traffic flow—and let human drivers know what’s going on. In computational simulations, the new approach ...

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.

Ahmedabad rolls out an AI-based traffic system at key junctions, using real-time data to reduce congestion, improve flow, and cut travel time.

There are three signals at a traffic light: red means stop, green means go, and yellow means that you have to slow done because the red light is about to appear. But how about if we have another light ...