Why are GPS units so much trouble.
I bought a Garmin Nuvi 5 or so years ago that worked most of the time,but occasionally went beserk.On our Christmas trip to South Carolina,it routed us one way going south and another way going north....
Forum Discussion
All GPS units have their quirks. They don't know that when creating a route, one road has a thousand traffic lights but picks that over the staight and direct route because the traffic light route calculated as a continuous drive is two minutes or a half a mile shorted. As others have said, always pre-check the route. If it is not going as you want it to go, add waypoints to force it the way you want it to go. I do a lot of tweeking and have been OK - but never follow blindly. I had the Rand MCNally RV GPS for one day - it was sending me on a road with a 7'10" clearance when set to avoid all roads with clearances below 12 feet and that made the decision to send it back to the store.
