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Multiple route pre-calculation and presentation for a vehicle navigation system

  • US 8,942,918 B2
  • Filed: 06/19/2009
  • Issued: 01/27/2015
  • Est. Priority Date: 06/19/2009
  • Status: Active Grant
First Claim
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1. A computer implemented navigation method for instructing an operator of a vehicle, the method comprising:

  • obtaining, at a computer system having a processor, a destination location;

    generating, with the processor, a proposed route to the destination location, the proposed route defined by one or more driver decision points and associated driving maneuvers; and

    before the vehicle reaches an approaching driver decision point of the driver decision points, pre-calculating an alternate route between the approaching driver decision point and the destination location, wherein the alternate route is different than the proposed route;

    determining a relative importance indicator for the alternate route, by;

    calculating whether a first approaching maneuver of the alternate route, at the approaching driver decision point, is optional;

    calculating whether the first approaching maneuver of the alternate route, at the approaching driver decision point, is highly recommended;

    calculating whether the first approaching maneuver of the alternate route, at the approaching driver decision point, is mandatory; and

    generating the relative importance indicator based upon the calculating steps, wherein the relative importance indicator conveys a condition of importance for the approaching driver decision point of the alternate route, and wherein the relative importance indicator is configured for communication to a user;

    wherein the relative importance indicator comprises;

    a first frequency of announcements of the first approaching maneuver when the first approaching maneuver is optional;

    a second frequency of announcements of the first approaching maneuver when the first approaching maneuver is highly recommended; and

    a third frequency of announcements of the first approaching maneuver when the first approaching maneuver is mandatory;

    wherein the first frequency comprises a low frequency, the third frequency comprises a high frequency, and the second frequency comprises a frequency between the low frequency and the high frequency;

    communicating the relative importance indicator to the operator of the vehicle; and

    saving the alternate route within computer memory to obtain a saved alternate route for subsequent activation.

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