NAVIGATION DEVICE, NAVIGATION METHOD, NAVIGATION PROGRAM AND COMPUTER READABLE RECORDING MEDIUM

摘要

An acquiring section (101) acquires current traffic jam information and past traffic jam information of a prescribed area. A comparing section (102) obtains increasing/reducing trend of the traffic jam by comparing the current traffic jam information with the past traffic jam information acquired by the acquiring section (101). A notifying section (103) notifies the increasing/reducing trend obtained from the comparing section (102). Thus, whether the traffic jam is to increase or to be eliminated can be judged from the time-series traffic jam information up to present. Accuracy of judgment is improved by using the past traffic jam information.