 The B @-@ series was originally put into service on the Sørland Line between Kristiansand and Stavanger , as part of the brand Agenda . The B @-@ series had been planned for use on the Østfold Line , but because the latter is largely a commuter service with many standing passengers , the company was not comfortable using the trains there until the issues regarding the axles and wheels had been resolved . NSB also stated that they were dissatisfied with that the A @-@ series and B @-@ series were not capable of working together . The B @-@ series ' lack of a manned dining car meant that they could not be used on intercity trains , while the A @-@ series ' smaller seating capacity meant it could not be used on regional trains . The B @-@ series was put into service on the Østfold Line on 6 January 2003 . NSB stated that the new class would offer better comfort and reduce the railway 's problems from delays caused by icing . On the Østfold Line , the maximum speed is 160 km / h ( 99 mph ) . From June 2003 , NSB discontinued the brands Agenda and Signatur . The same year , NSB adjusted the timetables so that the trains look the same time as the conventional trains , and that they would use one minute more than in 1982 . Starting on 15 December , three of the services on the Østfold Line were extended to Gothenburg in Sweden . 
