the city center. Operations from Kolsås to Bergkrystallen required ten T1300 trains. Oslo Sporveier decided that it wanted to remove the rush-hour services and instead introduced three-car trains. Because of this, all station platforms were extended in 1997, with the schedule changes taking effect from 7 April. The Kolsås Line was connected to the Østensjø Line and given number 3 from 5 April 1998. All T1300 stock were overnighted at Majorstuen Depot from 21 March 1999 and Avløs was reduced to a maintenance center. From 12 April 2003 the Kolsås Line was again served by Line 4 and linked with the Lambertseter Line. The new T2000 stock that was bought for the Holmenkollen Line was tested on the Kolsås Line in 1995, but the lower voltage made operations impossible. At Gjønnesjordet the current was measured at 311 volt. The current on the line was increased to 680 volt from 4 August 1995 and to 750 volt from 3 March 1999. The latter was done after the trams had been rebuilt to handle the increased voltage and the change took effect on the entire tramway. Metro standard Budgetary disagreements between local politicians in Oslo, Bærum and Akershus led to the closure of the Bekkestua to Kolsås leg on 1 July 2003. This allowed Oslo Sporveier to reduce the number of trains to eight, using three-car trains during rush-hour and twin units in off-peak hours. The move was little popular with the patrons and followed by protests. A political agreement was thereby struck, allowing services to Kolsås to resume from 20 November 2004. However, the line was in such poor shape that the speed was reduced several places. Only one extra train was added to the line, giving poorer regularity. Meanwhile, Akershus County Municipality was regarding what to do with the line. The first proposal came in 2002, when it was stated that the metro should terminate at Lysakerelven and that the rest of the line be operated as part of the tramway. Civitas published a report for the county in 2006. Critical remarks regarding costs and patronage issued by Oslo Sporveier were ignored. Based on the report, Akershus County Council passed a metro upgrade of the line. The cost from the municipal border to Kolsås was estimated at 677 million Norwegian krone. Both a metro and a tramway alternative were estimated to give the same traffic. The metro alternative would use