Patent ID: 9251703
Filing Date: 2016-02-02
CPC Classification: G01C,G08G

Claim Text:
1. A method of providing traffic information on a navigation system comprising: obtaining a current location of the navigation system from a global positioning system (GPS); determining, by a processor, whether a traffic message has been received at the navigation system, wherein the traffic message includes a traffic delta between current traffic data and historic traffic data for the current location; providing, by the processor, a current traffic condition when the traffic message has been received by combining the traffic delta in the traffic message with historic traffic data having a time stamp corresponding to a current time, wherein the historic traffic data is obtained from a historic traffic database on the navigation system, and wherein the traffic delta is received when the traffic delta exceeds a threshold, and the threshold is variable and dependent on a speed of the current traffic or a speed limit at a current location of the navigation system; and providing the historic traffic data from the historic traffic database on the navigation system when the traffic message has not been received.