The line is 14.2 kilometers (8.8 mi) long, and runs in a tunnel through the city center between Lindevang and Amager Strand.

Its southern end, in the district of Amager Øst, largely follows the same route as a disused railway line, Amagerbanen, along the coast of Øresund.

The principle of building a rail transit system was passed by the Parliament of Denmark on 24 June 1992, with the Ørestad Act.

Stage 2 involved the establishment of the company Fredriksbergbaneselskapet I/S in February 1995, owned 70% by the Ørestad Development Corporation and 30% by Fredriksberg Municipality.

The third stage would be built by Østamagerbaneselskapet I/S, established in September 1995 and owned 55% by the Ørestad Development Corporation and 45% by Copenhagen County.

In October 1996, a contract was signed with the Copenhagen Metro Construction Group (COMET) for building the lines, and with Ansaldo for delivery of the trains and operate the system the first five years.

[1] COMET was a consortium comprised Astaldi, Bachy, SAE, Ilbau, NCC Rasmussen & Schiøtz Anlæg and Tarmac Construction.

[2] Construction started in November 1996, with the moving of underground pipes and wires around the station areas.

In October and November, the two tunnel boring machines (TMB), christened Liva and Bette, were delivered.

The same month, the Public Transport Authority gave the necessary permits to operate a driverless metro.

Plans for M2 were presented to the public in April 1999, with a debate emerging if the proposed elevated solution was the best.

In December, the tunnels were completed to Strandlodsvej, and the TMBs were moved to Havnegade, where they started to grind towards Frederiksberg.

From 1 January 2000, the S-train service from Solbjerg to Vanløse was terminated, and work to rebuild to metro started.

[4] Trial runs on the next section of metro, stage 2A from Nørreport to Frederiksberg, began on 24 February.

However, the line had caused a heated debate, and several locals had organized themselves in the Amager Metro Group.

They demanded that the line instead be tunneled, arguing that it caused a physical barrier in Amager and that it created noise pollution.

It is the main intersection with DSB's intercity and regional trains, as well as the S-train, serving lines A, B, C, E and H.[19] Kongens Nytorv lies at the heart of the commercial and cultural center of Copenhagen.

[17] Christianshavn is located on an island, a former navy base that has been redeveloped into residential and commercial mix.

[22] Lergravsparken is surrounded by an older, dense residential area, although it has experienced commercial growth after the metro arrived.