We have an Iphone, an Android phone, built GPS on the truck, Trucker Path app & a Motor Carriers atlas & check all of them. The built in on the truck apparently needs an update as lately we can't trust it, no telling where we may wind up, the Google maps on the phones are definitely the most handy & most accurate, & the atlas list all the clearances per state in a couple of pages. The Trucker Path app has all sorts of info you can have listed, & if a truck can go that route we can.
Danny & Linda
Sold our '13 Thor Redwood 36 FB
Currently RV & truckless