[flybouy]

To Brian's story above travelin Texans I probably know the bridge he's talking about. I go around Lancaster going north to avoid the downtown circle and traffic. If you follow a "non RV" GPS you'll end up under that railroad bridge. My RV GPS will take me around low clearance bridges, route me around tunnels that prohibit transporting LP tanks, route me around turns that are too tight for the rig, bridges that are not rated for the weight, even warn me of Railroad crossings where the approach is too steep to drag a trailer over. All that by me entering a destination and pushing go. Seems like a good investment to me.

I don't understand the reluctance to buy a tool that could potentially save you a lot of pain and headache. It's a small price to pay considering the money invested in the truck and trailer. But that's just me. YMMV