City Circle Line
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The City Circle Line or M3 is a loop line of the Copenhagen Metro. It has been claimed by COWI A/S that the City Circle Line is the largest construction project to have taken place in Copenhagen during the last 400 years. The network's total length is 15.5 kilometres (9.6 mi) and has 17 stations. The line opened on 29 September 2019.
Øster Søgade construction site in 2014 (future sub-surface interchange between lines M3 and M4)
Copenhagen Metro
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The Copenhagen Metro is a 24/7 light rapid transit system in Copenhagen, Denmark, serving the municipalities of Copenhagen, Frederiksberg, and Tårnby.
A Metro train on approach to Flintholm Station
Crossover from elevated railway to tunnel near Islands Brygge
Copenhagen Metro train, with DR Byen in the background
Escalators at Amagerbro Station