when I want to find a location. We are off to Gennetines, a dance festival in in the middle of rural France and I have taken Goggle Earth screen shots of certain junctions, because I don't trust a SatNag - it will insist we go past the actual location on the other road. Or get off the Motorway early.
In ungfamilier territory it is a boon to be able to go there visually so that on the day we can identify turnings.

Having said that, there are numerous junctions that allow you to exit but not enter. And no reason for it, especially when you get there. It is a bug that craps-up (sic) time and again.