| 摘要 |
PROBLEM TO BE SOLVED: To predict traffic situations based on the correlation in the traffic situation between road sections. SOLUTION: A base vector generation part generates base vectors constituting a feature space representing correlation between a plurality of links by performing a principal component analysis for the necessary time in the past recorded in a necessary time database. A projection point trajectory generation part records a projection point trajectory of projecting the necessary time in the past recorded in the necessary time database to the feature space in a projection point database. A feature space projection part projects the necessary time at present to the feature space, and a neighboring projection point retrieval part retrieves a past projection point in the neighborhood of the concerned projection point from the projection point database, and a projection point trajectory trace part traces the trajectory of past projection points starting from the retrieved neighboring projection point for a prediction target time width, and an inverse projection part inversely projects the end point of the concerned trajectory to calculate the predicted value of the necessary time. COPYRIGHT: (C)2009,JPO&INPIT
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