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Navigation system for guiding vehicle by voice

  • US 5,410,486 A
  • Filed: 07/19/1993
  • Issued: 04/25/1995
  • Est. Priority Date: 07/20/1992
  • Status: Expired due to Term
First Claim
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1. A navigation system for issuing a route guidance for a vehicle orally as voice guidance, said system comprising:

  • means for storing route information required to reach a destination, said route information including information of a branch point on a road being traveled by said vehicle to be an object of said voice guidance;

    means for detecting a number of lanes of said road being traveled;

    means for calculating a position for issuing said voice guidance before said vehicle reaches said branch point in accordance with said detected number of lanes, said calculating means calculating said position for issuing said voice guidance at a position which is increasingly further away from said branch point as said detected number of lanes increases; and

    means for issuing said voice guidance at said position for issuing said voice guidance.

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