Not an issue as there are two other side roads round it that any size vehicle can take.

If you’re worried, you can use the second driveway and not go under the archway. We are 13’5”, so we didn’t even attempt o go under it.

I am not sure, my rig is 13'6" and we cleared with room to spare.

I am not positive, possibly 12 feet at the center of the arc. My rig is 11'3" and I could go under it but there are two are ways on either side to enter and leave so you don't have to go under it.

My recollection is that it's too short for big rigs. My single axle TT managed. If I recall correctly, there's a drive around so you needn't try to go under it.