The, present systems methods and programs, obtain probe information the probe,,Information comprising an average speed of probe cars traveling on each of a plurality.Of links in a predetermined area. The systems methods and programs detect,,,, for eachOf the plurality of links a first, degree of a traffic jam corresponding to the link for.Each of a plurality of different thresholds by comparing the average speed with each.Of the thresholds.The planning from various during the hour urgent using the Internet.
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