 The Oslo Metro uses 750 volt direct current fed to the train via a third rail , along a standard gauge track . The system is not compatible to the Oslo Tramway , but the T1300 and T2000 have been built to run on both the suburban lines of the tramway and the metro . The platforms are 110 metres ( 360 ft ) long , and the height of the train floors are 1 @.@ 12 meters ( 3 ft 8 in ) above the track , allowing step @-@ free access to the platforms . 
