I had to get a new Garmin while on the road through WV. She has taken us on every small road through downtown in this state. Garmin suggested getting the RV model. Does enybody have and information...
There should also be a setting for the type of vehicle, eg. Trucks, Cars and Motorcycles, Bus, etc. We always set it on Truck. I think if you choose Fastest Time it will keep you off the little roads.