On my OEM Chevy Silverado, when you get in some rural areas, the turn by turn navigation will end, and tell you turn by turn guidance can not be provided in this area, and tells you to follow the pointing arrow on the screen, which just points in the direction of your destination. I live in one of those areas where my OEM Silverado nav unit does this. Kinda defeats the purpose of having a Nav unit, since I think you would be more likely to get lost in a rural area, than a main road! All Garmin units I ever used will route you on any road in its database, just curious if the Z120BT did as well.