M3 (Copenhagen Metro)
Copenhagen Metro line
The M3 line or City Circle Line is a loop line of the Copenhagen Metro. It has been claimed by COWI that the line is the largest construction project to have taken place in Copenhagen during the last 400 years. The network's total length is 15.5 kilometres (9.6 mi) and has 17 stations. The line opened on 29 September 2019.
Plans for its construction were approved by the Danish Parliament on 1 June 2007. Preferred bidders were announced during November 2010. The total cost was estimated at 15 billion kroner but had risen to 21.3 billion kroner ($3.39 billion) when the contractors were announced in late 2010. It is a fully automated line, using driverless trains and capable of routine 24/7 operations. Italian rolling stock manufacturer AnsaldoBreda provides the trains for the new line, and the stations are intentionally similar to the Copenhagen Metro's existing stations. The transit agency Movia has projected that up to 34 million passengers eventually switch from buses to using the Metro during each year.
This brief starts where responsible research should: with the source description of “M3 (Copenhagen Metro)” as copenhagen Metro line. Everything that follows is an evidence route, not borrowed authority.
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Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 14, 2026. The linked authority identifier is Q1094251. Authority coordinates are 55.700, 12.550. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2019, 2007 and 2010.
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This entry incorporates text from “M3 (Copenhagen Metro)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.