Method of Developing Traffic Messages
First Claim
1. A computer implemented method of operating a navigation system, the method comprising:
- receiving a plurality of traffic messages, wherein the traffic message provides data indicating a traffic condition on a road network in a geographic region, said traffic message comprises a location reference code indicating a location on the road network of said traffic condition, an event code of said traffic condition, and a traffic quality code; and
using the traffic quality code of the traffic messages to provide navigation-related services on the navigation system.
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Abstract
A method is disclosed for developing traffic messages. The method obtains traffic data indicating collected traffic speeds at various locations on a road network. Traffic messages are developed from the traffic data. The method obtains ground truth data indicating ground truth speeds at a subset of the locations on the road network. The ground truth speed represents average speed of vehicles at one of the locations. For those locations for which ground truth speed has been obtained, the method computes a traffic quality value comparing the collected traffic speed to the ground truth speed for the location. The traffic messages and traffic quality data representative of the traffic quality values are transmitted.
22 Citations
20 Claims
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1. A computer implemented method of operating a navigation system, the method comprising:
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receiving a plurality of traffic messages, wherein the traffic message provides data indicating a traffic condition on a road network in a geographic region, said traffic message comprises a location reference code indicating a location on the road network of said traffic condition, an event code of said traffic condition, and a traffic quality code; and using the traffic quality code of the traffic messages to provide navigation-related services on the navigation system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer implemented method of operating a navigation system, the method comprising:
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receiving a plurality of traffic messages that provides data indicating traffic conditions on a road network in a geographic region, said traffic message comprises data indicating a location on the road network of said traffic condition, data indicating a type of said traffic condition, and data indicating a traffic quality value; and using the data indicating the traffic quality value when computing an estimated travel time for a route. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A navigation system comprising:
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a computer; and a receiver for receiving a plurality of traffic messages, the traffic message comprises a location code indicating a location on the road network of said traffic condition, an event code indicating a type of said traffic condition, and a traffic quality code indicating a quality value associated with the traffic message. - View Dependent Claims (18, 19, 20)
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Specification