Originally Posted by grayfox
Looks somewhat similar to the Marys Rock tunnel on Skyline Drive in Shenandoah National Park. Some restrictions there as well.
Maybe I'm stupid but I'd go thru the Zion tunnel in a heartbeat with my 40' Berky. I've been thru it many times by auto; never in a coach. Problem would be the switch backs on the west end of the tunnel; but quite negotiable I believe.
The engineering of the tunnel is extremely interesting. It basically follows along the face of the cliff, and is never more that 20' feet inside the cliff wall.
I always say it's like you entered a AC outlet at floor level in a room, traveled all the way around three sides of the room (inside the wall) and then exited through another outlet near the ceiling. Plus, as you traveled inside the wall, you could look out into the room through other scattered AC outlets in the wall.
Maybe a strange analogy, but that's the way it strikes me.