Abstract: Method and apparatus for determining a route from a source location to a final destination using a vehicle navigation system having a map database. At least one intermediate destination is determined from the map database, each intermediate destination being at the other end of an intermediate route from the source location. A cost value is calculated for each intermediate destination. A best intermediate destination is selected from the at least one intermediate destination, the cost value corresponding to the best intermediate destination being lower than the cost values corresponding to any other intermediate destinations. The intermediate route corresponding to the best intermediate destination is then communicated to the user of the vehicle navigation system while a remainder route to the final destination is determined.
Type:
Grant
Filed:
February 9, 1995
Date of Patent:
January 27, 1998
Assignee:
Zexel Corporation
Inventors:
Jeff Jyh-Min Liaw, Simon Peter Desai, Haruhisa Tamai