In the near future, Copenhagen will experience a vast upgrade to the already well-functioning public transport system. Two new metro lines will be added to the existing two lines bringing the total number of stations from 22 to 41.
Cityringen (M3) is a 15.5 km underground railway under downtown Copenhagen, connecting the the "bridge quarters": Vesterbro, Nørrebro, Østerbro with Frederiksberg and the historical city centre. The circle line will have 17 underground stations and opens in the summer of 2019.
In the beginning of 2020 the first two stations of the Nordhavn extension to Orientkaj Station (M4) will be linked to Cityringen. In 2024 the Sydhavn extension and its five extra metro stations will also be a part of the Copenhagen metro network.