You don't say?
http://www.bbc.co.uk/news/science-environment-12668230
I'm not surprised. I think most people have a GPS system in their car. I have one that I got as a present, but must admit it is onbly used so I can see what time I might be arriving at a destination rather than for guidance.
I do love studying a map though when going on a new route, often I find places to go on the way I'd miss if I stick in the GPS coordinates.