The Vestfold Line was organized as part of the Norwegian State Railways' Drammen District. At first the line was trafficked with two daily combined passenger and freight trains in each direction, in addition to a freight services on weekdays. The most important train was the post train, a combined post and passenger express which departed Oslo West Station at 08 hours and returned from Skien at 15 hours. It used the newest rolling stock Vy had available. At Skoppum there was a corresponding local train to Horten. From the opening of the Brevik Line in 1895, local trains started running between Brevik and Skien, and an additional daily express train was set up run to Brevik, where there was a corresponding steamship service to Kristiansand.