Systems, methods, and data structures for correcting traffic information
First Claim
Patent Images
1. A method of correcting traffic information, comprising:
- accumulating traffic information including, for each link, a link travel time and a trip time at which traveling will take place;
converting the link travel time into a vehicle speed;
calculating, as a first speed change amount, a difference between a first converted vehicle speed and a second converted vehicle speed at a predetermined time prior to the first converted vehicle speed;
comparing an absolute value of the first speed change amount to a predetermined value;
correcting the first converted vehicle speed if the absolute value of the first speed change amount is equal to or larger than the predetermined value; and
converting a corrected first converted vehicle speed into a corrected link travel time;
wherein the traffic information is accumulated in a memory in the accumulating step and the remaining steps are executed by a controller.
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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.
9 Citations
16 Claims
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1. A method of correcting traffic information, comprising:
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accumulating traffic information including, for each link, a link travel time and a trip time at which traveling will take place; converting the link travel time into a vehicle speed; calculating, as a first speed change amount, a difference between a first converted vehicle speed and a second converted vehicle speed at a predetermined time prior to the first converted vehicle speed; comparing an absolute value of the first speed change amount to a predetermined value; correcting the first converted vehicle speed if the absolute value of the first speed change amount is equal to or larger than the predetermined value; and converting a corrected first converted vehicle speed into a corrected link travel time; wherein the traffic information is accumulated in a memory in the accumulating step and the remaining steps are executed by a controller. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer-readable storage medium storing a set of computer-readable program instructions executable on a data processing device and usable to correct traffic information, the program comprising:
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instructions for accumulating traffic information including, for each link, a link travel time and a trip time at which traveling will take place; instructions for converting the link travel time into a vehicle speed; instructions for calculating, as a first speed change amount, a difference between a first converted vehicle speed and a second converted vehicle speed at a predetermined time prior to the first converted vehicle speed; instructions for comparing an absolute value of the first speed change amount to a predetermined value; instructions for correcting the first converted vehicle speed if the absolute value of the first speed change amount is equal to or larger than the predetermined value; and instructions for converting a corrected first converted vehicle speed into a corrected link travel time.
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8. A method of correcting traffic information, comprising:
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accumulating traffic information including, for each link, a link travel time and a trip time at which traveling will take place; converting the link travel time into a vehicle speed; determining that the vehicle speed is abnormal if the vehicle speed is larger than a predetermined value; replacing an abnormal vehicle speed with the predetermined value; and converting a replaced vehicle speed into a corrected link travel time; wherein the traffic information is accumulated in a memory in the accumulating step and the remaining steps are executed by a controller. - View Dependent Claims (9)
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10. A computer-readable storage medium storing a set of computer-readable program instructions executable on a data processing device and usable to correct traffic information, the program comprising:
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instructions for accumulating traffic information including, for each link, a link travel time and a trip time at which traveling will take place; instructions for converting the link travel time into a vehicle speed; instructions for determining that the vehicle speed is abnormal if the vehicle speed is larger than a predetermined value; instructions for replacing an abnormal vehicle speed with the predetermined value; and instructions for converting a replaced vehicle speed into a corrected link travel time.
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11. 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 and a trip time at which traveling will take place; and a controller that; converts the link travel time into a vehicle speed; calculates, as a first speed change amount, a difference between a first converted vehicle speed and a second converted vehicle speed at a predetermined time prior to the first converted vehicle speed; compares an absolute value of the first speed change amount to a predetermined value; corrects the first converted vehicle speed if the absolute value of the first speed change amount is equal to or larger than the predetermined value; and converts a corrected first converted vehicle speed into a corrected link travel time. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification