norwegian rapid transit line oslo metro norway branches runs kilometers branches serves northwestern northern neighborhoods oslo borough line owned maintained stations western end line serves entire line line eastern end line serve southern line branching continuing ring line gives average minute southern average minute northern line line opened october light rail upgraded metro standard light rail west oslo stations closed ring line opened transfer oslo serves serve serves norway largest football venue north line mainly serves residential areas serves recreational area history plans light rail route launched called branch line onwards proposal line launched established company started work planning neighborhoods built municipality wanted establish good transport system areas attractive stated build system line area municipality wanted political control development area applied build branch today ring line proposal included branch granted concession started construction january labor conflict work hold time called taken retained operation opened financial distress took majority shares time merged work commenced line opened october line built double track single track upper section converted double track construction spurred massive residential construction line giving good foundation municipal merger oslo merged remained partially owned subsidiary bought remaining shares years later operations transferred remaining pure real estate company municipal resulted upgrade track rolling stock new overhead wires new heavier track laid trains taken use lines numbered line designated quickly changed 1980s city decided connect suburban lines west city center selected line upgraded systems compatible line upgraded metro standard replacing overhead wire rail power supply installing automatic train protection stations rebuilt platforms lengthened fitting car fitting car trains platform height increased rail required level crossings removed resulting line rebuilt places allow road light rail permitted passengers cross lines stations impossible metro standard built stations station rebuilt trains line stop closed stations built architectural style constructed concrete steel columns wooden sheds fences platforms shed larger weather cover design inspired football upgrade included installation rail january open april line started operating connected line new service operated rolling stock following decision build new decided extend pass plans called transfer station later discarded favor new station replace considered far away suitable transfer point serve northern campus necessary political agreements place allow construction start new light rail started services june rapid transit station opened august opening line metro extended complaints local residents increased traffic line causing noise neighbors demanded noise shields built oslo presented plans connect new ring line company considered building ring combined operation metro later discarded despite higher investment costs metro higher operating costs longer travel time detailed suggestion presented oslo august clear served neighbors complained proposal stating hoped section rebuilt tunnel argued line running grade densely populated areas run tunnel compensate stated build noise screens line city council voted favor building ring line june votes financing partially ensured december political agreement reached financing plan investments public transport oslo construction started june agency road transport municipality responsible construction section opened august opening line extended august final section opened closed summer improvements track rail line closed approximately week leaves covered tracks operation line replaced buses served temporary stops truck stuck train bridge bridge damaged allowed way traffic weeks half trains stop meantime route line branches heads northwards borough stations serve campus transfer allows connection largest hospitals country serves norway largest sports venue home ground norwegian national football team north reaching services branches ring line serves stations reaching line runs parallel motorway ring north line mainly serves residential areas including student served station serves recreational area lake service served lines oslo metro half line trains operate length line half line trains branch serve ring line services operate minute late evenings weekend gives stations average minute city center stations average minute east city line connects makes loop leaves oslo line connects line travel time minutes operated oslo contract transfer possible transfer serves mainline trains available west bound mainline trains reached oslo reached city center
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