Right by my house I have a four lane (on one side) intersection with a traffic signal. Each of the lanes goes straight ahead. However, each lane has its own traffic light, and when the traffic light rotation is in that direction, it alternates the two left most straight lanes red while the right most are green, and then switches (because very shortly after the intersection there is a quick lane reduction to two lanes).

I can't imagine how AI would _correctly_ see four straight arrowed lights in front of it in the intersection, some of which are red, some are green. Humans of course recognize that they correlate to the lanes, but this is a more esoteric case for AI to assimilate.