 However, there would be no need for standard gauge until the Sørlandet Line was extended to Rogaland, so the line was planned to be built with narrow gauge track, but all other installations would be prepared for standard gauge.Siting of the Ålgård Line from Ganddal to Ålgård started in 1920.The final cost estimate was NOK 2.82 million and the plan was passed by Parliament on 20 July 1921, with construction commencing on 21 December.