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Method and apparatus that search for a route

  • US 20050187702A1
  • Filed: 01/27/2005
  • Published: 08/25/2005
  • Est. Priority Date: 02/20/2004
  • Status: Abandoned Application
First Claim
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1. A route search apparatus comprising:

  • a memory that stores hierarchical map data and predicted traffic information, the hierarchical map data comprising at least wide-area map data and local-area map data; and

    a controller that;

    receives current traffic information from outside the route search apparatus;

    searches a tentative route from a start point to a destination, based on the hierarchical map data;

    searches for a start-area route from the start point to a point on the tentative route at which the wide-area map data is connected to the local-area map data, based on the local-area map data and the current traffic information;

    searches for a destination-area route to the destination from a point on the tentative route at which the wide-area map data is connected to the local-area map data, based on the local-area map data and the predicted traffic information; and

    determines a navigation route from the start point to the destination, based on the start-area route, the tentative route, and the destination-area route.

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