LOL - seriously?I'd guess there are far fewer permutations of those than colors, shapes, sizes, and types of motor vehicles and pedestrians, yet the vehicle seems to be able to recognize those with a reasonable degree of accuracy.
A large blob, roughly the size of a car, in the travel lane - hmmm... is it a car? I think it's a car. I'll assume it's a car and plan accordingly. Vastly different from a sign on the sidewalk with verbiage that sets logical boundaries for a speed limit. It has "Speed Limit" on it, and a number (usually 25MPH). But what is all that other stuff on the sign?
I swear... I really want Tesla to just take the signs as speed limits and apply them immediately. That will solve it. Then we'll just hear the complainers yelling about "Why did my car slow from 45MPH to 25MPH?!?!!? It's Saturday at 7PM!!!!"