M4 (Copenhagen)

The M4 (the Harbour Line) is a future expansion of the Copenhagen Metro connecting Nordhavn in the north with Sydhavn in the south. The central part of the line shares tracks with the City Circle Line (M3) which is scheduled to open in February 2020.

TypeRapid transit
SystemCopenhagen Metro
LocaleCopenhagen, Denmark
København H
Stations13 (under constuction)
OpenedFebruary 2020
Operator(s)Metro Service

The Nordhavn branch was approved by the Danish Parliament in 2012[1] and is expected to open in 2020. The Sydhavn branch was approved in 2015[2] and is expected to open in 2024.

Both Nordhavn and Sydhavn are former industrial areas situated at opposite ends of the Port of Copenhagen and currently undergoing urban renewal under the auspices of By & Havn.

When the City Circle Line was planned, the M4 was intended to supplement the M3 from Nørrebro to København H providing increased metro capacity to the eastern section of the inner city. At this time, it was presumed that the M4 would eventually be expanded from Nørrebro to the northwestern suburbs, but this plan was abandoned in 2009, when the city of Copenhagen scrapped plans for an interchange facility under Nørrebro station. Instead, the city preferred a solution where the M4 would connect the Nordhavn and Sydhavn districts.

Stations and route

The M4 Line will serve 13 stations. From København H to Østerport the line is shared with M3.

Stations under construction

Nordhavn section (2020)

  • Orientkaj
  • Nordhavn (interchange with S-trains)

Stations shared with the M3 (2020)

Sydhavn section (2024)

  • Havneholmen
  • Enghave Brygge
  • Sluseholmen
  • Mozarts Plads
  • Ny Ellebjerg (interchange with S-trains and DSB)

In April 2017 it was announced that the five Sydhavn stations would feature artwork from five Danish artists: Superflex, Pernille With Madsen, René Schmidt, Christian Schmidt-Rasmussen, Henrik Plenge Jakobsen.[3]

Possible future extensions

An extension in Nordhavn with 3 additional stations have been proposed, with the possibility of extending the line even further towards Hellerup Station.[4]

Two possible extensions from Ny Ellebjerg Station in Sydhavnen are being looked into. One towards Hvidovre and one towards Bispebjerg.[5][6] To enable such future extensions from the current M4 terminus, Ny Ellebjerg, it was decided in 2016 that the station would be built as an underground station instead of overground as previously decided.[7]


  1. Gregersen, Rasmus (21 June 2012). "Ny metro til Københavns Nordhavn". Building Supply. Retrieved 6 April 2017.
  2. Østergaard, Christian (6 February 2015). "Sydhavnsmetroen er vedtaget". Ingeniøren. Retrieved 6 April 2017.
  3. "Der kommer kunst i Sydhavnsmetroen". Magasinet KBH. 29 April 2017. Retrieved 1 May 2017.
  4. "København dropper metro-ringbane gennem Nordhavn". Ingeniøren. 23 June 2016. Retrieved 6 April 2017.
  5. "Metro til Zoo". Lokalavisen Frederiksberg. 19 May 2016. Retrieved 6 April 2017.
  6. "Regionsrådet Møde nr 10" (PDF). Region Hovedstaden. Retrieved 6 April 2017.
  7. Brahe-Pedersen, Christian (14 October 2016). "Ny metrostation bliver underjordisk". Licitationen. Retrieved 6 April 2017.
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