Researchers Propose a Fourth Light on Traffic Signals – For Self-Driving Cars

At a traffic light, red means stop and green means go. “The white phase concept also incorporates a new traffic signal, so that human drivers know what they are supposed to do. The white light is a signal that AVs are coordinating their movement to facilitate traffic through the intersection more efficiently. “And, just to be clear, the color of the ‘white light’ doesn’t matter. What’s important is that there be a signal that is clearly identifiable by drivers.”The researchers first introduced a “white phase” traffic intersection concept in 2020.