The M4 (the Harbour Line) of the Copenhagen Metro connects Nordhavn in the north with Sydhavn in the south. The central part of the line shares tracks with the

City Circle Line The M3 line or City Circle Line is a loop line of the Copenhagen Metro. It has been claimed by COWI A/S that the line is the largest construction project to have taken place in Copenhagen during the last 400 years.Danish Parliament The Folketing ( , ), also known as the Parliament of Denmark or the Danish Parliament in English, is the unicameral national legislature (parliament) of the Kingdom of Denmark — Denmark proper together with the Faroe Islands and Greenland. E ...

in 2012 and was opened on 28 March 2020. The Sydhavn branch was approved in 2015 and opened on 22 June 2024. Both Nordhavn and Sydhavn are former industrial areas situated at opposite ends of the

Port of Copenhagen The Port of Copenhagen () is the largest Denmark, Danish seaport and one of the largest ports in the Baltic Sea basin. It extends from Svanemølle Beach in the north to Hvidovre in the south. Along with Malmö harbour, Copenhagen Port is operate ...

and currently undergoing

urban renewal Urban renewal (sometimes called urban regeneration in the United Kingdom and urban redevelopment in the United States) is a program of land redevelopment often used to address real or perceived urban decay. Urban renewal involves the clearing ...

under the auspices of

By & Havn By & Havn (English: ''City & Port'') or ''Udviklingsselskabet By & Havn I/S'' (en.: ''The corporation for development of City and Port General partnership, I/S'') is an organisation, tasked with the development of Ørestad and Port of Copenhagen, t ...

. When the

City Circle Line The M3 line or City Circle Line is a loop line of the Copenhagen Metro. It has been claimed by COWI A/S that the line is the largest construction project to have taken place in Copenhagen during the last 400 years.Nørrebro Nørrebro (, ) is one of the 10 official districts of Copenhagen Municipality, Denmark. It is northwest of the city centre, beyond the location of the old Northern Gate (''Nørreport''), which, until dismantled in 1856, was near the current N ...

to København H providing increased metro capacity to the eastern section of the

inner city The term inner city (also called the hood) has been used, especially in the United States, as a euphemism for majority-minority lower-income residential districts that often refer to rundown neighborhoods, in a downtown or city centre area. Soc ...

. 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 serves 13 stations. From København H to Østerport the line is shared with M3.

Stations

Nordhavn section (2020) * Orientkaj * Nordhavn (interchange with S-trains) Stations shared with the M3 (2020) * Østerport (interchange with S-trains and DSB) * Marmorkirken (The Marble Church) *

Kongens Nytorv Kongens Nytorv (literal translation, lit. "The King's New Square") is a town square, public square in Copenhagen, Denmark, centrally located at the end of the Pedestrian zone, pedestrian street Strøget. The largest square of the city, it was l ...

(interchange with all other metro lines) * Gammel Strand near

Christiansborg Palace Christiansborg Palace (, ) is a palace and government building on the islet of Slotsholmen in central Copenhagen, Denmark. It is the seat of the Danish Parliament (), the Danish Prime Minister's Office, and the Supreme Court of Denmark. Also ...

* Rådhuspladsen ( City Hall Square) * København H (Copenhagen Central Station, interchange with

S-trains The S-Bahn ( , ), , is a hybrid urban–suburban rail system serving a metropolitan region predominantly in German-speaking countries. Some of the larger S-Bahn systems provide service similar to rapid transit systems, while smaller ones of ...

and DSB.) Sydhavn section (2024) * Havneholmen * Enghave Brygge *

Sluseholmen Sluseholmen () is an artificial peninsula in the South Harbour of Copenhagen, Denmark. It takes its name from Slusen, a lock immediately to the south, regulating water levels in the harbor. Previously the site of heavy industry and part of the S ...

* Mozarts Plads * Copenhagen South (until 2024 named 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.

Possible future extensions

An extension in Nordhavn with 3 additional stations have been proposed, with the possibility of extending the line even further towards . Two possible extensions from Copenhagen South Station are being looked into. One towards Hvidovre and one towards Bispebjerg. To enable such future extensions from the current M4 terminus, Copenhagen South it was decided in 2016 that the station would be built as an underground station instead of overground as previously decided.

References

{{Copenhagen Metro Railway lines opened in 2020 2020 establishments in Denmark Port of Copenhagen