Our 5th wheel is 13'4" actual measured height hitched up to truck
We FTd for 7 yrs traveling ONLY secondary/back roads
12 trips across US...border to border/coast to coast
We DID encounter 'Low Overpasses'.....roadways/train trestles etc.
Those encounters were back East....New England States
And those were clearly marked with signage PRIOR to encounter where an alternative route was available
Except for One where the signage was there but bushes/vegetation had overgrown and covered it. So we turned around and went another way
One other encounter was in NY around Schenectady IIRC. We came down a roadway that was an overpass which then circled down/around to that roadway without any options. Just before merging onto that roadway SHE noticed overpass sign showed 11'9"....I put a halt/dead stop and traffic was backing up behind us.
I got out to see if I could backup anywhere and look for options.
Guy in a truck about 5 vehicles back YELLED "You can make it. Roadway was cut down/lowered and sign was never changed. I go thru there all the time with tractor/trailer.....trust me!"
So we slowly inched forward and we cleared it by roughly 3"....WHEW as there were really NO Options
So moral is.......Majority of the US A-OK
East Coast pay attention to SIGNAGE
And "When in Doubt/Turn About"
And CGs are more troublesome then roadways
Look UP!!!!