Almost destroyed my 37’ RV, on an 8’8” Low height bridge

As you travel around this country you will find MANY things that are not on your maps or GPS. All you can do is be vigilant, read all of the warning signs, and drive carefully on roads that are new to you.
In Zion National Park in Utah, there are tunnels where they stop traffic in the other direction so RV's can travel down the center of the road to avoid hitting the tunnel roof that slopes to the sides.