Why does the route the NAV300 calculates differ from my preferred route for going from point A to point B?
Calculation on the NAV300 unit is based on a complex algorithm that compares each road segment with respect to speed, traffic flow, number of lanes, etc. In some cases, the suggested route may follow a different set of streets than what you are used to. This is correct behavior and follows the rules specified in the database. Routes will also change depending on if you have selected fastest or shortest route or have prohibited use of interstates, ferries, or tollways. Route settings can be changed in the settings menu by going to Settings -> Routing Options.
