Not really GPS based taxing, but along the same lines, all new cars are equiped with some pretty high speed computer stuff that controls brakes, airbags, and other stuff. Should you crash your car, significant data can be downloaded from one of these black boxes letting the car maker and law enforcement know lots of cool things about the moment prior to impact.....speed, braking rate, angle of car (such as from turning), and stuff that could impact on your defense should you be sued for negligence.
Don't want LE or manufacturer to download such data??? Easy, disconnect the devices. Asisde from the impact on operations, what you are not told when you buy the car and is burried so deep in the fine print, is that the manufacturer retains ownership of this charming and intrusive little gadget!! You can't D/C it!!
Lovely