Natural rights. Clearly. The Constitution doesn't grant rights, it limits abrogation of certain rights. The right to travel is long established in common law.
You're relying on "preferred" to do all the work there.
There are plenty of contexts where cars are the only realistic mode of travel and then it isn't a matter of preference because there isn't any viable alternative.
It appears to me that the Court holds that riding in an airplane or car is a right (of travel) but that piloting or driving that airplane/car is a privilege.
But then you come to the context where driving it yourself is viable and hiring a private chauffeur is infeasibly uneconomical and you've got some trouble.
