unionrayo.com - Traffic lights color white autonomous cars

"This will be used as a special sign to indicate to drivers that autonomous vehicles are controlling the road at that moment. Today, traffic lights tell us when to stop or go on, but autonomous cars can communicate among themselves and with these traffic lights to organize the traffic flow in a faster and more precise way than humans.

When there are enough autonomous cars near an intersection, the white light will turn on. This would mean that cars are coordinating the traffic automatically. So, human drivers wouldn’t have to do anything differently, just simply follow the car in front of them (if that car is an autonomous one, it will know exactly when to continue or stop).

Of course traditional lights (red, yellow, and green) will continue working as usual. The white light will only show up when there are many autonomous cars coordinating among themselves."