TRAVEL ROUTE-SPECIFYING SYSTEM, TRAVEL ROUTE-SPECIFYING METHOD, TRAVEL ROUTE-SPECIFYING DEVICE, PROGRAM, AND RECORDING MEDIUM

摘要

The present invention comprises: a map-matching unit (112); a travel route-specifying unit (115); a first position determination unit (113) for determining whether a first position obtained by map-matching immediately prior to loss of radio wave reception is within a range set in correlation to a first end point; and a second position determination unit (114) for determining whether a second position obtained by map-matching immediately after radio wave reception is regained is within a range set in correlation to a second end point. The travel route-specifying unit (115) specifies a road within a difficulty region that connects from a first end point to a second end point as the travel route of the vehicle when the first position-specifying unit (113) determines that the first position is within the range set in correlation to the first end point in the difficulty region, and the second position-specifying unit (114) determines that the second position is within the range set in correlation to the second end point in the difficulty region.