PURPOSE:To instantaneously decide an optimum transport service route by calculating this route by reference to the route data which are previously collected and stored. CONSTITUTION:The route decision data 6a are previously stored in a file before input of the station name data 6b and used for the calculation processing 8 where a transport service route is decided. At the same time, the contents of the data 6b stored in the file are corrected at occurrence of the transfer of a station. The data 6b include the names of stations where the transport services are expected when the decision of a transport service route is desired. Thus the data 6b are inputted and the processing 8 is carried out with use of the data 6a. Thus the transport service route is decided. In such a way, an optimum transport service route is instantaneously decided.
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