Cityringen is a completely new metro line constructed on the same principles as the existing Copenhagen metro network. The Cityringen circle line will be a 15.5 km underground railway under downtown Copenhagen, the "bridge quarters" and Frederiksberg. Cityringen will have 17 underground stations.
A large number of changes to the city’s utility grid had to be implemented first. These took place primarily in 2010 and 2011. Around the same time, archaeologists from The Museum of Copenhagen worked on what the museum terms “Northern Europe's largest archaeological excavation to date”. In the current fase of the construction tunnels and stations are being constructed. Cityringen is to open in 2019.
One capital city, one transportation system
Once Cityringen's two new lines, M3 and M4, are in service, passengers will be able to transfer to the existing metro at the Kongens Nytorv and Frederiksberg stations. It will also be possible to transfer to the regional rail and commuter train network at Copenhagen Central, Østerport, and Nørrebro stations. Cityringen will reduce travel times dramatically. To take just a few examples, a journey from Nørrebro Runddel to Enghave Plads will take seven minutes; from Nørrebro station to Trianglen, six minutes; and from Poul Henningsens Plads to Rådhuspladsen, eight minutes.