TRAFFIC PROFILING AND ROAD CONDITIONS-BASED TRIP TIME COMPUTING SYSTEM WITH LOCALIZED AND COOPERATIVE ASSESSMENT
First Claim
1. A traffic measuring system comprising:
- a location-determining device;
a speed limit database storing speed limits for a plurality of road segments;
a speed-determining device for determining a current speed of the system; and
a processor determining a current location of the system, including a current road segment from the location-determining device, the processor determining a speed limit of the current road segment, the processor comparing the current speed of the system to the speed limit of the current road segment to determine a traffic condition.
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Accused Products
Abstract
This invention localizes traffic condition detection and classification to a vehicle. Vehicles work cooperatively to fuse their traffic condition assessments so as to produce larger geographical coverage and more reliable evidence of the conditions. The system can be executed on an onboard device which includes at least one of the following: GPS capabilities, connection connected to the vehicle to measure vehicle speed, or communication with a cell phone. In the example of the cell phone, speed can be computed from phone GPS, a GPRS/CDMA, or both. Otherwise, vehicle speed can be determined obtained from in-vehicle on-board diagnostic system (e.g. using the OBD-II protocol) or based on GPS and accelerometer readings.
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Citations
21 Claims
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1. A traffic measuring system comprising:
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a location-determining device; a speed limit database storing speed limits for a plurality of road segments; a speed-determining device for determining a current speed of the system; and a processor determining a current location of the system, including a current road segment from the location-determining device, the processor determining a speed limit of the current road segment, the processor comparing the current speed of the system to the speed limit of the current road segment to determine a traffic condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for measuring traffic including the steps of:
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a) determining a current location of a vehicle; b) determining a current speed limit based upon the current location of the vehicle; c) determining a current speed of the system; and d) comparing the current speed of the system to the current speed limit to determine a traffic condition; wherein said steps a-d) are performed on the vehicle. - View Dependent Claims (15, 16, 17, 18)
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19. A method for measuring traffic including the steps of:
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a) receiving a spoken description of a traffic condition; b) receiving a location of the traffic condition; c) parsing the spoken description of the traffic condition to determine the traffic condition; and d) associating the traffic condition with the location, based upon said step c). - View Dependent Claims (20, 21)
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Specification