 Initially there were four services in each direction each day, with three services on holy days. The train that connected with the steam ship would wait up to 45 minutes in case of delays, to allow connection. Until 1927, the routes remained the same. That year, the Kragerø Line opened, and it became possible to take a night train from Oslo to Kragerø, continue by bus to Flekkefjord, and be in Stavanger the following afternoon. Travel time was further reduced when the Sørland Line was extended to Arendal in 1935. The initial rolling stock was from the Voss Line, and some of the bridges and track was from that line too. The Voss Line was being upgraded to 25-kilogram (55 lb) rail tracks, and 25 km (16 mi) of 17 kg (37 lb) track was used on the Flekkefjord Line.
