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 green, a white light could signal that autonomous vehicles are in charge of the intersection. Or the vehicles could possibly make signals irrelevant altogether.
North Carolina State University associate engineering professor Ali Hajbabaie is among those imagining the future of traffic lights.
“When we get to the intersection, we stop if it’s red, and we go if it’s green,” Hajbabaie told The Associated Press, “but if the white light is active, you just follow the vehicle in front of you.”