NAVIGATION SYSTEM AND METHOD

摘要

PROBLEM TO BE SOLVED: To provide individual users with appropriate guidance information. SOLUTION: A reretrieval request from a user or a reretrieval when out of a route is learned with an average travelling speed for every section. When an average travelling speed in a section becomes equal to the learned average travelling speed or slower during traveling in the route, a route is retrieved again. COPYRIGHT: (C)2005,JPO&NCIPI