Traffic lights might see a fourth signal as self-driving cars become more practical. Getty Images/iStockphoto. The researcher’s latest plans differ from a 2020 model of a four-light intersection.

A new paper from the Institute of Electrical and Electronics Engineers tackles that problem head-on by proposing a fourth light on our familiar tri-colored traffic lights specifically for ...

1914, however, saw the first electric traffic light. It was designed by James Hoge in Cleveland, and he even received a patent in 1918. His traffic light featured two illuminated words, “stop” and ...

A surprising amount of technology might be making that red light hold you up. Here's how traffic lights detect (or don't detect) your vehicle.

The team first introduced the idea of a fourth light in 2020, but realized a centralized system with a traffic light receiving AV signals and calculating the best route caused processing delays.