Systems, methods, and data structures for correcting traffic information
First Claim
Patent Images
9. A method of correcting traffic information, comprising:
- accumulating traffic information including, for each link, a link travel time during at least one trip time;
converting the link travel time into a vehicle speed;
determining that the converted speed is abnormal if the converted vehicle speed is larger than a predetermined value; and
replacing the abnormal vehicle speed with the predetermined value.
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Abstract
Systems, methods, and data structures for correcting traffic information data may accumulate traffic information data including, for each link, a link travel time during at least one trip time. The systems, methods, and data structures may convert the link travel time into a vehicle speed and correct the converted vehicle speed if a the vehicle speed or a first speed change amount is equal to or larger than a predetermined value.
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Citations
21 Claims
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9. A method of correcting traffic information, comprising:
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accumulating traffic information including, for each link, a link travel time during at least one trip time;
converting the link travel time into a vehicle speed;
determining that the converted speed is abnormal if the converted vehicle speed is larger than a predetermined value; and
replacing the abnormal vehicle speed with the predetermined value. - View Dependent Claims (10, 11)
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12. A system for correcting traffic information, comprising:
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a memory that accumulates traffic information including, for each link, a link travel time during at least one trip time; and
a controller that;
converts the link travel time into a vehicle speed;
calculates, as a first speed change amount, a difference between the converted vehicle speed and a vehicle speed that precedes the converted vehicle speed;
compares the first speed change amount to a predetermined value; and
corrects the converted vehicle speed if the first speed change amount is equal to or larger than the predetermined value. - View Dependent Claims (15, 16, 17)
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13-1. The system of claim 13, wherein, if the first speed change amount and the second speed change amount are identical in direction of change, the controller:
corrects the converted vehicle speed to a value obtained by adding the predetermined value to the vehicle speed that precedes the converted vehicle speed.
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18. A traffic information data structure, comprising:
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accumulated traffic information including, for each link, a link travel time and a vehicle speed during at least one trip time, the vehicle speeds being obtained by converting link travel times for each link;
wherein the data is produced by correcting at least one vehicle speed, the at least one vehicle speed to be corrected having a difference from a vehicle speed that precedes the converted vehicle speed by a predetermined time period, the difference being greater than a predetermined value. - View Dependent Claims (19)
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20. A traffic information data structure, comprising:
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accumulated traffic information including, for each link, a link travel time and a vehicle speed during at least one trip time, the vehicle speeds being obtained by converting link travel times for each link;
wherein the data is produced by correcting at least one vehicle speed, the at least one vehicle speed to be corrected being greater than a predetermined value. - View Dependent Claims (21)
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Specification