Traffic information prediction system
First Claim
1. A traffic information providing apparatus comprising:
- a traffic information database for recording time sequential data of traffic information;
a traffic condition change detection unit which detects a location and time period of a traffic event causing a change in data distribution of the traffic information and outputting the location and time period as traffic condition change information;
a traffic event database for recording a location, time period and type of the traffic event capable of changing traffic conditions;
a traffic event retrieval unit which retrieves a traffic event corresponding to the location or time period of the traffic condition change information from said traffic event database, and outputting the location and type of the retrieved traffic event as traffic condition change factor information; and
a display unit which displays said traffic condition change information and said traffic condition change factor information.
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Abstract
A traffic information prediction system has a traffic information database for recording time sequential data of traffic information and a traffic condition change factor database for recording the location, time period and type of an event which may change traffic conditions. The time period and location of the change are detected from data distributions of the traffic information, the change being unable to be explained even by day factor information such as days of the week, seasons and commercial calendar, and weather information. An event having a relatively shorter temporal and spatial distance from the detection results is searched from the traffic condition change factor database. The traffic information prediction system can detect an occurrence of an event changing the traffic conditions and its influence area.
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Citations
8 Claims
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1. A traffic information providing apparatus comprising:
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a traffic information database for recording time sequential data of traffic information;
a traffic condition change detection unit which detects a location and time period of a traffic event causing a change in data distribution of the traffic information and outputting the location and time period as traffic condition change information;
a traffic event database for recording a location, time period and type of the traffic event capable of changing traffic conditions;
a traffic event retrieval unit which retrieves a traffic event corresponding to the location or time period of the traffic condition change information from said traffic event database, and outputting the location and type of the retrieved traffic event as traffic condition change factor information; and
a display unit which displays said traffic condition change information and said traffic condition change factor information. - View Dependent Claims (2, 3)
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4. A traffic information providing method comprising steps of:
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detecting a location and time period of a traffic event changing data distribution of traffic information from time sequential data of past traffic information;
retrieving a traffic event corresponding to the location and time period of the traffic event changing data distribution from a traffic event database for recording a location, time period and type of each traffic event capable of changing traffic conditions; and
providing the position of the change in said data distribution and the position and type of said retrieved traffic event.
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5. A traffic information providing method comprising steps of:
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detecting a time period during which data distribution of traffic information is changed, from time sequential data of past traffic information; and
calculating a change quantity of traffic information by linear or nonlinear regression analysis using traffic condition variables representing the data distributions before and after the change by different numerical values, wherein in detecting the time period during which the data distribution of the traffic information is changed, a change in the data distribution of the traffic information removing an influence of a season variation is detected by comparing the data distributions of the traffic information of a plurality of years divided into data groups of a same season, a same month, a same week and the like.
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6. A traffic information providing method comprising steps of:
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detecting a time period during which data distribution of traffic information is changed, from time sequential data of past traffic information; and
calculating coefficients of a linear or nonlinear regression model for approximately estimating traffic information, by using, as parameters, traffic condition variables representing said data distribution before and after the change by different numerical values, and day factor variables representing a correspondence with day factors including days of the week, weekdays/holidays, seasons, commercial calendar and the like, wherein in providing a prediction value of the traffic information in a future day, the traffic information is provided by using said regression model setting said traffic condition variables to numerical values representative of said data distribution after the change, and setting said day factor variables to numerical values representative of the day factor of the future day. - View Dependent Claims (7, 8)
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Specification