 All trains receive 750 V DC from a third rail shoe , while the T1300 and T2000 also have pantographs . This allows the latter to also operate on the suburban lines of the Oslo Tramway , which the western part of the current metro was part of until 1995 . All trains feature automatic train protection and step @-@ free access from the platforms . Trains can operate up to six cars in length . The T1000 / T1300 and MX3000 are capable of 70 kilometres per hour ( 43 mph ) , while the T2000 can operate at 100 kilometres per hour ( 62 mph ) . The T2000 introduced articulated cars , while the MX3000 introduced regenerative brakes and air conditioning . The T1000 / T1300 and MX3000 can be run in multiple with each other , but not with the T2000 . The MX3000 replaced the red color scheme with a white livery . 
