Patent Number: 7,355,528

Title: Traffic information providing system and car navigation system

Abstract: A traffic information providing system externally acquires traffic information including information relating to the travel time of a link, calculates a travel time for a non-provision link to which no travel time is provided through estimate/complement operation. The estimate/complement operation is carried out with use of travel times, emergencies, travel times of links in the vicinity of the non-provision link, and so on, obtained in the near past. The system stores and statistically processes the externally-acquired traffic information, and also estimates a travel time in the near future. When there is an abnormality in the acquired traffic information, the system deletes the abnormality, regards the information as a non-provision link, calculates a probability distribution of travel times of links, calculates a probability distribution of travel times of the entire route made up of a plurality of links, and also calculates a probability for a specific travel time range.

Inventors: Yamane; Kenichiro (Hitachi, JP), Fujiwara; Junsuke (Hitachi, JP), Endo; Yoshinori (Mito, JP), Machii; Kimiyoshi (Hitachi, JP), Kumagai; Masatoshi (Hitachi, JP), Yokota; Takayoshi (Hitachiota, JP), Matsuo; Shigeru (Hitachinaka, JP)

Assignee: Hitachi, Ltd.

International Classification: G08G 1/123 (20060101)

Expiration Date: 2020-04-08 0:00:00