Except for an emergency break-down, no distance that requires getting on the highway. The tow vehicle kicks up all sorts of trash, rocks, glass, sticks etc, and it goes right on the bike on the trailer. You can't put a cover on the bike because it will flap in the wind and tear-up the paint. Call me picky, but I would get an enclosed trailer if I decided I needed a trailer on a regular basis. You can also rent an enclosed U-Haul when needed if it is a rare occasion that you need one. Just my opinion.