Every car with a built in GPS (which these days is almost every car) has the same situation. If your car knows where you are it knows how fast you’re going, and it knows enough about the local traffic laws (if only from observing their other drivers) to know when you’re breaking them.
If your car knows where you are, it can”t know how fast you’re going: Heisenberg.
I saw one GPS showing the car was going nearly 2000 mph. It was funny at the time but maybe not so funny when next time you get a ticket.