To solve the problem that confirmation has to be made because a destination, a path, etc., depend upon self-declaration when an employee goes on a business trip.

The installation positions of base stations are calculated on the basis of a base station ID whose position is registered by a PS 4. A travel path including stations or bus stops of traffic facilities, where the PS 4 goes through is also searched on the basis of the installation positions of base stations by referring to a storing means for storing traffic facilities information including the stations and the bus stops of the traffic facilities.