I mostly use a GPS, but I like to have a map as backup.
We live in the mountains of WV. GPS and computer map sites don't understand mountains, and mountain roads. It is a fairly common occurrence around here to have a semi making a delivery get stuck on some mountain road that is too narrow and crooked for anything much longer than a pickup truck. The GPS may think it is the shortest way, but it is not suitable for larger and longer vehicles.
Also, they have a prejudice for federal highways over state highways. Around here, many the federal highways were built earlier than many of the state highways. Often the state highways are much better, because they were originally routed when modern earthmoving equipment permitted wider straighter routes to be selected. A few years ago, we had some friends come visit and the map program told them to cross the high mountains east to west on a US route, then re-cross west to east on another US route. We locals know, and a map will show, a nice straight (by WV standards) WV route straight down the valley. Shorter, faster, easier.
I've had my GPS try to route me across Forest Service roads which are on the map, but are gated closed to the public.
GPS is nice, but you need to understand its limits. I like having a map for checking/backup.
Wayne
