The on-board map will have only streets that Apple decides are in your (their) best interest listed. All other streets will simply, as far as your car is concerned, not exist. Any time your car is "in limbo" (moving from one mapped area to another) your car doors will lock and the windows will tint black to prevent any interaction with or observation of an area outside the knowable universe. Trying to attach a third party charging or fuelling device will cause your vehicle to immediately shut down. And yet, despite these facts, millions of people will develop panic attacks any time they are encouraged to actually leave their vehicle leading to a society that is forever commuting but never actually arriving anywhere useful.