PROBLEM TO BE SOLVED: To upgrade precision in route search processing while sustaining secrecy of information which a user or road administrator does not want to provide.SOLUTION: A route search system includes a route search unit 3 and traffic information processing unit 5. The route search unit performs first route search processing ST3 of searching a route from a departure point to a destination point using plural search requests including the departure point, destination point, and departure time or arrival time. Based on a result of search, the route search unit calculates ST4 passage schedule information representing the number of vehicles scheduled to pass a predetermined point on a road at a time succeeding a current time. The calculated passage schedule information is transmitted ST5 to the traffic information processing unit. The traffic information processing unit produces ST7 risk information, which represents a degree of difficulty which a vehicle has in passing the predetermined point on the road, on the basis of traffic information including the received passage schedule information and at least one of a measured traffic volume on the road and traffic regulation information, and transmits ST8 the produced risk information to the route search unit.
【課題】ユーザーや道路管理者が提供したがらない情報の秘匿性を維持しつつ、経路探索処理の精度を向上する。【解決手段】経路探索システムは、経路探索装置3と交通情報処理装置5とを備える。前記経路探索装置は、出発地点及び目的地点と出発時刻又は到着時刻を含む複数の探索要求を用いて、前記出発地点から前記目的地点までの経路を探索する第1の経路探索処理ST3を行う。探索結果に基づいて、道路の所定地点を現時点以後に車両が通過する予定の台数を表す通過予定情報を算出ST4する。算出した前記通過予定情報を前記交通情報処理装置に送信ST5する。前記交通情報処理装置は、受信した前記通過予定情報と、道路の測定交通量及び通行の規制情報のうちの少なくとも1つよりなる交通情報とに基づいて、車両が前記道路の所定地点を通過する場合の難度を示すリスク情報を生成ST7し、生成した前記リスク情報を前記経路探索装置に送信ST8する。【選択図】図3
ROUTE SEARCH SYSTEM, ROUTE SEARCH METHOD, ROUTE SEARCH UNIT, TRAFFIC INFORMATION PROCESSING UNIT, AND COMPUTER PROGRAM
経路探索システム、経路探索方法、経路探索装置、交通情報処理装置及びコンピュータプログラム
22.06.2015
Patent
Elektronische Ressource
Japanisch
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