Common Sense versus GPS
People are quite trusting of their car GPS devices. You punch in a destination, it tells you where to go. However, it doesn't always tell you the best way to get there. No database accounts for all variables that may effect the safety of your drive. Issues that have been noted to occur include weather conditions on roads not meant for winter travel, and use of roads that simply were not meant for car traffic.
Example: a GPS directing a car over a mountain pass on a narrow Forest Service road with winter snow conditions, where common sense would have dictated using a much safer route. The couple survived three days trapped in these conditions.
Another story: when a bridge got washed out in Luckington, UK, locals put many warning signs indicating this on the road leading to it. However, GPS units continue to tell people to follow the road. People are more inclined to trust their GPS unit than their own eyes. As a result, locals have been pulling out an average of two cars a day out of the river.
While such stories are not endemic, they appear often enough on the news to be some cause for concern. GPS is increasingly being used as a replacement to old fashioned common sense, but no navigation device is a complete replacement for the human brain, at least quite yet.