Patent ID: 6405130
Filing Date: 2002-06-11
Classification: G01C,G08G

Abstract:
A navigation system comprising:a database of roads to be traveled by a vehicle, said database includes road segments, each said road segment having an associated travel time stored in said database; a system for selecting a first origin relative to said database; a user input device for selecting a first destination relative to said database; a system for determining a first route from said database from said first origin to said first destination; a system for determining the current location of the navigation system relative to said database; and a system for determining a second route from said database from a second origin on said first route between said current location and said first destination said system for determining said first route utilizing said associated travel times to determine said first route and for determining said second route utilizing said associated travel times to determine said second route, said system comparing said first route to said second route.