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System and method for estimating impedance time through a road network

  • US 20050090976A1
  • Filed: 12/08/2004
  • Published: 04/28/2005
  • Est. Priority Date: 12/11/2001
  • Status: Abandoned Application
First Claim
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1. A navigation system comprising:

  • a server including—

    a storage unit holding a data structure having data indicative of roads in a roadway network and intersections of the roads at nodes, a route calculation module calculating a planned route over the roadway network between source and destination locations based on the data structure held in the storage unit, and a correction module for identifying undesirable shortcuts constituting predefined paths along the roads and through the nodes in the roadway network route that, while reducing an overall distance traveled by the planned route, are to be avoided in the planned route between the source and destination; and

    a navigation device operable to transmit the locations to the server and receive the route from the server over a communications link.

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