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US 6,285,950 B1Granted
Vehicle navigation system
AssigneeAlpine Electronics, Inc.
InventorSatoshi Tanimoto
Life of this patent
Estimating the term…
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AssigneeAlpine Electronics, Inc.
InventorSatoshi Tanimoto
Estimating the term…
A vehicle navigation system estimates a travel time to a destination. Estimation of a travel time to a destination includes two steps of calculation. First, a travel time to an intermediate point forward of the present vehicle position is calculated based on the current average speed. Second, a travel time to the destination from the intermediate point is calculated based on the costs of road segments. A travel time to the destination from the present vehicle position is a sum of the travel time obtained by the first calculation and the travel time obtained by the second calculation. Since the current average speed reflects the road conditions to which the vehicle is presently subjected, the travel time to the intermediate point calculated with the current average speed is more accurate than a travel time that would be calculated by adding the costs between the present vehicle position and the intermediate position. As a result, a sum of the travel times obtained by the first calculation and the second calculation is more accurate than a travel time that is calculated by adding the costs throughout the road segments between the present vehicle position and the destination.
An on-board vehicle navigation system having a function of estimating a travel time for a vehicle to travel to a destination from a present vehicle position along a predetermined route, comprising on the vehicle:
An on-board navigation system capable of guiding a vehicle to a destination from a present vehicle position, comprising on the vehicle:
In a vehicle navigation system, a method of estimating a travel time for a vehicle to travel to a destination from a present vehicle position along a predetermined route, comprising:
Dependencies are inferred from the claim text.