Method and system for providing alternate routes with a navigation system
First Claim
1. A program, for use with a vehicle navigation system capable of calculating a route from an origin to a destination, estimating a time of travel from said origin to said destination, and determining a location of a vehicle and an actual time of travel of said vehicle along said route, comprising:
- means for determining whether the actual time of travel of said vehicle to a position along said route exceeds an estimated time of travel to said position along said route by a threshold amount of time; and
means for automatically initiating calculation of one or more alternate routes to said destination when said actual time of travel exceeds said estimated time of travel by said threshold amount of time.
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Accused Products
Abstract
A feature for a navigation system that provides an evaluation of alternate routes. According to this feature, the navigation system compares the actual time of travel along a route to the estimated time of travel along the route. If the actual time of travel exceeds the estimated time of travel, alternate routes to the destination are calculated and provided to the user. This feature enables driver-experienced traffic conditions to be taken into account.
189 Citations
56 Claims
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1. A program, for use with a vehicle navigation system capable of calculating a route from an origin to a destination, estimating a time of travel from said origin to said destination, and determining a location of a vehicle and an actual time of travel of said vehicle along said route, comprising:
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means for determining whether the actual time of travel of said vehicle to a position along said route exceeds an estimated time of travel to said position along said route by a threshold amount of time; and
means for automatically initiating calculation of one or more alternate routes to said destination when said actual time of travel exceeds said estimated time of travel by said threshold amount of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 29, 30, 31, 32, 33, 34, 35)
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8. A vehicle navigation system comprising:
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a route calculator, capable of calculating a route of travel along roadways from an origin to a destination;
a route travel time estimator, capable of estimating a time of travel along roadways of a route calculated by said route calculator;
a vehicle position locator, capable of determining the position of a vehicle relative to a roadway;
an actual time of travel calculator, capable of determining the actual time of travel of said vehicle along a route calculated by said route calculator;
a threshold parameter;
a travel time deviation calculator, capable of determining with respect to at least a portion of a route calculated by said route calculator whether an actual time of travel determined by said actual time of travel calculator exceeds an estimated time of travel determined by said route travel time estimator by a given amount based on said threshold parameter; and
an alternate route calculator capable of calculating an alternate route of travel along roadways to said destination. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24, 25, 26, 36, 37, 38, 39, 40, 41, 42)
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22. A vehicle navigation system comprising:
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a route calculator, capable of calculating a route of travel along roadways from an origin to a destination;
a route travel time estimator, capable of estimating a time of travel along roadways of a route calculated by said route calculator;
a vehicle position locator, capable of determining the position of a vehicle relative to a roadway;
an actual time of travel calculator, capable of determining the actual time of travel of said vehicle along a route calculated by said route calculator;
a threshold parameter;
a travel time deviation calculator, capable of determining with respect to at least a portion of a route calculated by said route calculator whether an actual time of travel determined by said actual time of travel calculator exceeds an estimated time of travel determined by said route travel time estimator by a given amount based on said threshold parameter; and
an alternate route calculator capable of calculating an alternate route of travel along roadways to said destination, wherein said alternate route calculator is disabled where an estimated time of travel is less than a pre-determined amount.
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27. A method in a navigation system, comprising:
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calculating a route of travel for a vehicle along roadways from an origin to a destination;
estimating the time of travel to one or more points along said route;
calculating the actual time of travel of said vehicle to said one or more points along said route;
determining whether said actual time of travel of said vehicle to one of said one or more points along said route exceeds said estimated time of travel to said one of said one or more points by a given amount based on a threshold parameter; and
calculating one or more alternates routes to said destination upon a determination that said actual time of travel exceeds said estimated time of travel by a given amount based on said threshold parameter. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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28. A method in a navigation system, comprising:
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identifying a destination selected by a user of said navigation system;
identifying the roadways traveled by said user between a first location and second location;
calculating the actual time of travel of said user from said first location to said second location;
estimating the time of travel along said identified roadways between said first location and said second location;
determining whether said actual time of travel of said vehicle exceeds said estimated time of travel by a given amount based on a threshold parameter; and
calculating two or more routes to said destination upon a determination that said actual time of travel exceeds said estimated time of travel by said given amount based on said threshold parameter. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56)
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Specification