Years back when I moved from NJ to WV I rented that same truck (26ft. 26,000#).
On the second trip of three, I was moving some heavy machinery and thought I might be over weight. When I got close to the weigh station I got off the interstate and took the back road.
When I came to a turn the GPS said to go left but I did not think that was correct so I went right (not a good idea).
After about seven miles on a two lane road (with no place to turn around) I came to tunnel. The sign said 12'3" IIRC the truck was 12' 1" or 12' 2". As I sat there thinking about what to do (did I mention this was at night?) a truck pulled up behind me, the driver got out came up to me and said "I don't think you are going to make it".
I said to him I think i have 1 or 2 inches clearance.
After a short discussion we decided he would guide me thru.
I made it without any problem.
After unloading I realized I was not over weight.

A few years ago I was on the interstate in WV and as I neared an exit there was a road closed sign, I exited and got onto a road that ran parallel to the interstate.
When I neared a bridge overpass there was a large dump truck body wedged between the road and the bottom of the bridge. The cab and frame was in the median.
The driver was killed in the crash.
Apparently he had the body up when he got on the highway, I don't under how one could miss the fact the body was in the raised position when he got into the cab.