So the new fangled Model S with the in screen camera ... In the USA it "reads" the posted speed limit sign. And displays it on dash board. I saw this on a loaner P85. Now, for European / UK cars ... does it work the same way and read the signs with the "black numbers and red circle"? I ask as, I rented a car in the UK a while back and its GPS/NAV included the speed limit on the nav but the car contained no camera. So the nav "databases" in the UK must contain speed limit information for the roads? Why then would Tesla reinvent the wheel if they have?