norwegian meter double track railway tunnel runs oslo oslo norway tunnel constitutes eastern section runs central business district oslo features track station norway second busiest railway station oslo tunnels lies directly beneath oslo metro built tunnel busiest section railway line norway serves west bound trains oslo including services oslo commuter rail stations larger located spot current oslo served line caused physical barrier parts railway network connected ran partly city streets formal planning central station tunnel connecting line started final plans approved opened june possible close oslo saw major upgrade expanded tracks tunnel major technical upgrade plans build second tunnel increase train capacity west oslo route tunnel constitutes easternmost meters runs tracks platforms connect tunnel shaped funnel eventually merging tracks tunnel runs important heritage buildings oslo including parliament norway building second busiest railway station country located oslo metro station station tracks meter long island platforms serving central business district oslo section line runs oslo metro meters point line meters surface located partially built including meter long island platform entrances line follows surfaces west immediately line merges station line service heavily section mainline railway norway theoretical capacity trains hour direction applied capacity trains hour direction rush hour trains operating tunnel capacity passengers hour line oslo commuter rail services operate tunnel terminate operates hourly services tunnel norwegian state railways operate regional trains line trains line tunnel freight trains operate tunnel night freight trains instead line history 1930s oslo main railway stations oslo west station consisting commuter trains regional trains line line terminated trunk terminated stations ran ran city streets limited number freight trains plans launched connect stations prominent line running west oslo merging elevated line oslo tunnel elevated line past established look possible connection extension railway station led committee recommended alternatives establish branch built tunnel city center trains terminate tunnel proposed run gate west gate intermediate station close location proposed tunnel meters long largely run clay making construction difficult expensive alternatively branch line built city connect commuter trains continue run oslo regional trains run committee stated preferred suggestion led established government presented new report recommended new route tunnel considered ease construction increase safety based engineering report detailed plans line compromise norwegian state railways need line straight possible demands construction risk buildings area ground oslo consists clay filled grooves meters deep area contains expands comes contact air water attack concrete cracks clay water hard volcanic rocks committee led established look matter recommended tunnel central station felt tunnel longer intersect point build second station proposal presented november matters related rail transport investments construction passed unanimously planning office established initially led final plans route passed parliament construction started main contractors included tunnel officially opened minister transport communications officially taken use june opened eighth longest railway tunnel norway thirteenth longest tunnel cost million norwegian nok paid nok million tunnel commuter trains trains tunnel turned oslo central station taken use november closed traffic transferred october construction upgraded started taken use december work expanded station platforms increasing applied capacity tunnel trains direction hour expansion cost nok million included blasting cubic metres rock pouring cubic metres concrete work resulted meters new tunnel new entrance hall art station designed passengers daily old section station renovated upgrades included new lighting new public address system new powerful fire safety system improved emergency exits replacement cables upgrade old section lighter previously painted dark red visually similar new section performing major upgrade section including upgrades axle mounting overhead conductor rail new switches switch tunnel openings new tracks future largest bottle neck railway system norway delays caused tunnel spread network local rail lines departures hour wished order attract people want find departure times matching work hours stated earliest unnecessary capacity running west oslo includes possible railway lines oslo high speed lines completion line new schedule plan proposed asked slots tunnel available possible solution decrease reserve capacity increasing capacity trains hour direction tunnel characterized critically new tunnel built necessarily run proposal calls separate commuter train station built underground location walking distance proposal involves line connecting existing route reaching lobby organisation called line run north serve major metro hub tunnel built higher speeds state necessary build high speed rail bergen combined new line tunnel allow travel time oslo reduced minutes
Oslo Tunnel