GPS isn't the only thing that can cause a lumber truck to end up in a swamp.
A number of years ago the 'guys' were trucking fir logs down a certain area with a very sharp curve in the road. If you took the curve easy you would be fine but if you took it hard and lost control you and your truck would end up in one hell of a swamp.
To make a long story short, there was a pretty little Lady that lived just a ways before that curve. Now this Lady had a very very adequate bosom and she would sit out by her mail box and when she heard one of those trucks a coming she would make sure the trucker got a very good bouncy look at two of the best nekkid yahooos those guys ever saw...
Sure enough... another one bites the swamp...
BTW folks, Ladies can go topless in public in Maine... There is no law against it...
So it ain't just the GPS that causes problems