You have the right to freedome oof travel. nowhere in the charter does that define a "Mode" of travel. Wanna Travel? WALK.
Driving is a PRIVLEDGE not a right
Air Travel is a PRIVLEDGE extended by a PRIVATE operator and not a right.
Travel by BOAT (unless privately owned) is a PRIVLEDGE extended by a PRIVATE operator and not a right.
Walking, Jogging, Running, Cycling etc are all within your RIGHTS to freedom of travel.
Does anyone actually ever read the back of the ticket where it says (paraphrase) you buy the ticket, we decide whether you travel?