PawPaw_n_Gram wrote:
Yes, most RV GPS units allow you to put in the rig height.
But remember, the GPS data is only as good as the data from the highway departments, and clearance never considers the entry/ exit road height changes which can make the roof of the rig higher than the level ride height.
I would personally be concerned about any bridge I approach which is listed as less than 1 foot of clearance for my rig.
In some states, Florida and the northeast mainly - 13'6" is over the legal limit. You won't get a ticket for an inch, but don't try to complain if you hit a bridge or traffic light.
PawPaw_n_Gram, It is clear you don't tow a 5er. Most 5er's with standup headroom in the upper level for a 6' person have a height of no less than 13'.
One needs to be aware of lower clearances at the curb lane, when crossing truss bridges. That said the max height for a semi on the interstates is 13'-6", Overall you should be fine on state highways and interstates, DON'T get on a New York Parkway!!!! They are designed for cars only, and have some low clearances.
If you are concerned get either a RV GPS, or a Truckers GPS.