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Method and apparatus for vehicle navigation and guidance through a traffic circle

  • US 5,848,364 A
  • Filed: 05/10/1996
  • Issued: 12/08/1998
  • Est. Priority Date: 05/10/1996
  • Status: Expired due to Term
First Claim
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1. In a navigation system for a vehicle, a method of guiding a vehicle along a calculated route through a traffic circle comprising the steps of:

  • determining an appropriate turnoff from the traffic circle along the calculated route;

    signaling entry of the vehicle into the traffic circle;

    at an appropriate point, notifying user to exit the circle at the appropriate turnoff;

    determining that the vehicle has missed the appropriate turnoff;

    before proceeding to an off-route routine, determining that the vehicle is still in the circle and instructing the user to proceed around the circle; and

    at an appropriate point, again notifying user to exit the circle at the appropriate turnoff.

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