1. A method for use with a vehicle that travels actual routes and is equipped with a navigation device that recommends suggested routes, the method comprising: receiving a first suggested route from the navigation device; detecting a first deviation between the first suggested route and a first actual route traveled by a vehicle; and storing a first deviation data related to the first deviation at the navigation device; detecting a second actual route traveled by the vehicle, the second actual route including following the first suggested route past the first deviation; and based at least in part on the second actual route following the first suggested route past the first deviation, resetting a counter associated with the first deviation data; and filtering of collected deviation data including the first deviation data by ignoring logged route deviations based at least in part on a counter value being below a threshold.