DETECTION AND ESTIMATION OF VARIABLE SPEED SIGNS
First Claim
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1. A method comprising:
- receiving probe data collected at a plurality of vehicles associated with a road segment;
determining location values for the probe data;
calculating, by a processor, center distance values for the location values based on the road segment;
determining speed values for the probe data;
performing, by the processor, an analysis on the speed values of the probe data to identify a first cluster of probe data and a second cluster of probe data;
assigning center distance values to the first cluster of probe data; and
calculating a lane assignment based on the center distance values assigned to the first cluster of probe data.
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Abstract
Systems, methods, and apparatuses are disclosed for predicting or estimating the value of a variable speed sign (VSS). Probe data is received from multiple vehicles associated with a road segment. Location values are derived from the probe data. Center distance values are calculated based on the location values and the road segment. Clusters are derived from the probe data. Center distance values are grouped according to the respective clusters and a lane is assigned to at least one cluster based on the center distance values. The speed of the cluster predicts or estimates the corresponding lane of the VSS.
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Citations
20 Claims
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1. A method comprising:
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receiving probe data collected at a plurality of vehicles associated with a road segment; determining location values for the probe data; calculating, by a processor, center distance values for the location values based on the road segment; determining speed values for the probe data; performing, by the processor, an analysis on the speed values of the probe data to identify a first cluster of probe data and a second cluster of probe data; assigning center distance values to the first cluster of probe data; and calculating a lane assignment based on the center distance values assigned to the first cluster of probe data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a memory configured to store probe data collected at a plurality of vehicles associated with a road segment, wherein location values and speed values are derived from the probe data; and a multi-modality detection and clustering device configured to calculate center distance values for the location values and analyze the speed values of the probe data to identify a cluster of probe data, wherein a lane is assigned to a speed for the cluster of probe data based on a center distance value assigned to the cluster of probe data. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A non-transitory computer readable medium including instructions that when executed on a computer are operable to:
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collect probe data associated with a road segment; and send the probe data to a multi-modality detection and clustering device configured to calculate center distance values for the location values and analyze the speed values of the probe data to identify a cluster of probe data, wherein a lane is assigned to a speed for the cluster of probe data based on a center distance value assigned to the cluster of probe data; wherein a message including the speed value is broadcasted to at least one vehicle traveling near the lane.
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Specification