You're driving and you want to know what kind of cell-phone coverage you're going to be getting on the road ahead - see, there's a 5 mile sketchy "short" cut where you have sketchy service - meaning, if it's dark and something happens, you'd wish you were safe and home in bed, and there's the longer 22 mile road around the farms with reliable service.
Wouldn't you want that standing out on the map?
