Traffic data collection with probe vehicles
First Claim
Patent Images
1. A method of collecting traffic information comprising:
- in each one of a plurality of vehicles being driven along roads in a geographic area;
determining which location reference code represents that portion of the road network upon which the vehicle located;
determining a vehicle speed; and
transmitting data that indicates the location reference code and the vehicle speed from the vehicle to a central traffic facility.
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Abstract
A method is disclosed for collecting traffic information using probe vehicles that are driven along roads in a geographic area. In each of the probe vehicles, the vehicle speed and the location reference code that represents that portion of the road network upon which the vehicle is located are determined. The probe vehicle transmits data that indicates the location reference code and the vehicle speed for the location reference code to a central traffic facility.
61 Citations
19 Claims
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1. A method of collecting traffic information comprising:
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in each one of a plurality of vehicles being driven along roads in a geographic area; determining which location reference code represents that portion of the road network upon which the vehicle located; determining a vehicle speed; and transmitting data that indicates the location reference code and the vehicle speed from the vehicle to a central traffic facility. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A navigation system used in a vehicle comprising:
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a positioning system; a geographic database; navigation applications that use the geographic database and data from the positioning system to provide route guidance to a driver of the vehicle; data transmission equipment operable for transmitting data messages from the vehicle over a network to a central traffic data facility; and a data collection application that uses data in the geographic database to determine a vehicle speed and an associated location reference code and transmit the vehicle speed and associated location reference code to the central traffic data facility.
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17. A probe vehicle for collecting traffic data comprising:
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a positioning system installed in the probe vehicle; a geographic database; data transmission equipment operable for transmitting data from the probe vehicle over a network to a central traffic data facility; and a data collection application that uses data in the geographic database to determine a vehicle speed and an associated location reference code and transmit the vehicle speed and associated location reference code to the central traffic data facility. - View Dependent Claims (18)
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19. A geographic database used in a probe vehicle for traffic data collection comprising:
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data that represents road segments in a geographic area; and data that relates road segments to location reference codes used in traffic messages.
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Specification