Consider a GPS that allows you to enter rig height. There are a couple out there, I like my Garmin 760LMT. Always watch for the signs.
Sobering reminder. Happened this week at an overpass under construction north of Austin. Interesting to see that the signs noted the height to be 13' 6", actual height just over 14 feet. Unlike the cherry picker on the flatbed which knocked a beam down crushing a pickup and severely damaging 2 other semi's, our trailers would likely be the weaker of the two links, but no need to find out.