the course connection is a marketing - instrument in the railway nature. Similarly as with the reservation of a Flugtickets the customer before travel start can commit itself for a travel time in selected courses and keeps for it his ticket more favorable. This discount applies with many offerers only to a certainContingent at tickets. Conversion and Rückerstattung of such tickets are often connected with additional costs.
The advantage for the offerer of such discounts is in higher planning security and thus in the better extent of utilization of its courses.