Revenue service
The long section from Hell to Stjørdal started revenue service on 1 February 1902. The long section from Stjørdalshalsen to Levanger was officially opened on 27 October 1902, with ordinary services starting on 29 October. The long section from Levanger to Verdal was opened on 1 November 1904, although the station building was not completed until 1905. At the time there were two trains per direction per day, one passenger train and one post train. The official opening of the long section between Verdal and Sunnan took place on 14 November 1905. Revenue service started the following day.