Fonzie is correct, and as long as you don't hit an overpass - nobody cares and when you're legal in your home state you'll be legal here as a guest. It is usually gas stations and campgrounds that can give you grief. I don't know your travel plans but as long as you're on one of the major highways all the overpasses are clearly labeled and I can't remember a single one that is below 15', most are 18' or more.
B.t.w. there are some really weird numbers floating on the Internet, mainly due to poor metric conversion.
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