There's no right to use a motor vehicle for transit either. Driving, like flying, is a privilege and not a right. The ability to file an appeal if you lose your

There's no right to use a motor vehicle for transit either. Driving, like flying, is a privilege and not a right. The ability to file an appeal if you lose your license is also a privilege; it is a creature of the laws that created driver's licenses in the first place. A legal designation of a common carrier is a significant burden upon the freedoms of those supplying a transportation or information service - it is not a step that is taken lightly by Congress. And even that designation isn't all-or-nothing; common carriers can still refuse to provide services. For example, even the U.S. Mail can refuse to transport hazardous materials.