Patent ID: 8090523
Filing Date: 2012-01-03
Classification: G08G

Abstract:
1. A travel-time prediction apparatus, to which are input a link specified as a prediction target from a set of all links, date and time of the prediction target and travel-time time-series data that is input sequentially in relation to the specified link, for outputting predicted travel time in the specified link and at the date and time, wherein said apparatus comprises: a database that stores travel-time transition patterns obtained by statistically processing past time-series data of each link according to at least day type, said data base supplying a travel-time transition pattern corresponding to the specified link and day type; a conversion parameter calculating unit that calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and sequentially input travel-time time-series data will be reduced, wherein calculation is performed of conversion parameters of a travel-time transition pattern for which the sum of a penalty term and a weighted error between the travel-time transition pattern and the sequentially input travel time will be reduced; and a prediction unit that makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters.