Has anyone traveled US HWY 62 east out of Bentonville, Ark? If so, what info can you give regarding the railroad overpass at Gateway, Ark? I was looking at it on Google Earth, sign states 13' 10". I'm headed that way later this week with 5th wheel, don't wish to remove my AC units!
No concern unless you have an extreme odd situation and sit ridiculously high (and not sure how you could be). 13' 6" is standard semi height as well as base for overpasses.
You can get a very rough estimate by while hooked up and running a tape measure from the highest point on 5TH to ground. Then add about 1 1/2 foot for the AC and that will certainly be over your actual height.