line line norwegian kilometer long single track railway line norway station line connects connects line runs allowed access oslo oslo east station line built norwegian state railways opened december line electrified nearly oslo bergen trains line terminate oslo east station possible reach oslo albeit terminating oslo west station ran local service oslo line oslo bergen trains ran local train services terminated line remains use freight trains oslo bergen route route line starts station located line kilometers oslo located meters mean sea level highest elevation line line runs west south passing station station reaching kilometers long time separate stations located end town station serving terminus line runs south west past reaching branch lumber mill line runs tunnels meters long located kilometers spur military camp line runs meter long bridge passing spur reaching station line runs meters long bridge line come east continue west kilometers oslo kilometers history opened october intermediate station connects initial proposals route went oslo west station oslo met combination political opposition technical restrictions 1880s 1890s lines connect sweden built narrow gauge connected oslo narrow gauge rest lines west oslo planning time known military considerations eventually led decision build standard gauge eventually decided built standard gauge reach oslo longer route connect built allowing line connect important construction line passed line built project construction mountain commenced construction line started section relatively flat easiest project build line officially opened section vii november taken ordinary use december time line opened stations begin line single train oslo bergen additional summer express limited number stops addition additional trains oslo night train introduced year mixed passenger freight trains introduced oslo station opened august october economic impact world war night train services reduced twice week june new stations established world war frequency reduced train day parts oslo bergen line instead run lines local trains kept route november daily oslo bergen trains ran local trains oslo increased daily round trips weekly night trains introduced january weekly express services situation normalized daily day night trains weekly express trains stops oslo opened august 1930s decided electrified section bergen completed line electrified sections oslo opened electric traction february automatic signaling service december automatic train stop operation october june day train moved run line daily round trips local train oslo normally class class unit reduced single round trip morning train oslo return afternoon eventually taken class unit late 1990s taken service line remains pure freight track long haul freight trains opening passenger trains run line reserve line passenger trains service
Roa–Hønefoss Line