The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2009
Filed:
Aug. 19, 2005
Masatoshi Kumagai, Hitachi, JP;
Takumi Fushiki, Hitachi, JP;
Takayoshi Yokota, Hitachiota, JP;
Kazuya Kimita, Hitachi, JP;
Masatoshi Kumagai, Hitachi, JP;
Takumi Fushiki, Hitachi, JP;
Takayoshi Yokota, Hitachiota, JP;
Kazuya Kimita, Hitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a congestion prediction using measurement data which is acquired by an on-road sensor or a probe car, and which includes none of explicit information about bottleneck points, with respect to time-sequence data on congestion ranges accumulated in the past, data on congestion front-end positions are summarized into plural clusters by the clustering. Representative value in each cluster is assumed as position of each bottleneck. A regression analysis, in which day factors are defined as independent variables, is performed with congestion length from each bottleneck point selected as the target. Here, the day factors refer to factors such as day of the week, national holiday/etc. It then becomes possible to precisely predict a future congestion length.