We run 12'-8" on the truck and in ten years we have only found two "NO-GO" locations. One in Idaho where a dirt road went under the main highway and we cleared that by staying Way left. The other was a series of railroad underpasses in Binghamton, New York that were only 10-6. Clearly marked, but only at the last cross street before the underpass.
We had to run parallel to the railroad until we could get back on the Interstate and go over the tracks
Look out for gas stations.
If you ever go to Canada, you have to know your clearances in Meters.