Nec Soft, Ltd.

Nec Corporation

Yasuhiro Sugisaki

Takashi Fujita

Junichi Takeuchi

Takayuki Nakata

Akinori Satou

Takayuki Morikawa

Toshiyuki Yamamoto

Tomio Miwa

Enjian Yao

The route search system of the present invention receives the provision request of the information about route search from a route search terminal. The information included in the provision request from a route search terminal is acquired, calculation processing of the environmental load value of the relevant vehicle and the environmental load value of other vehicle by which it is generated with movement of a relevant vehicle from the acquired information is carried out using an environmental load calculation unit.

Route search system, route search terminal and route search method

Disclosed is a travel-time prediction apparatus that is capable of making a mid-term prediction of travel time accurately by combining present conditions and statistical information. The apparatus includes a travel-time transition pattern database storing travel-time transition patterns obtained by statistically processing past time-series data of each road link according to type of data. Upon accepting a travel-time transition pattern corresponding to a specified link and day type from the database, the apparatus calculates conversion parameters of a travel-time transition pattern for which an error between the travel-time transition pattern and a sequentially input travel-time time-series data will be reduced, and then makes a prediction using a prediction function obtained by converting the travel-time transition pattern by the calculated conversion parameters. The calculated predicted value and the conversion parameters are distributed as traffic information.

Travel-time prediction apparatus, travel-time prediction method, traffic information providing system and program

Growing community of inventors

Tokyo, Japan

Yasuhiro Sugisaki