Because of delays from Stadler's subcontractors, five instead of eight trams were available when the line opened on 22 June 2010. Skyss had planned to operate with a ten-minute headway until August, but had a 15-minute headway until 16 August. To compensate, none of the parallel bus routes ceased until then. On 7 June, two trams collided at low speed at Byparken, causing a derailment and forced the two trams to be repaired. This caused the summer schedule to be reduced to a 30-minute headway. From 1 November, the line started running every six minutes during the rush hour. On 22 June, the first part of the line was officially opened by Queen Sonja of Norway.