page_title: U3 (Hamburg U-Bahn)
section_title: History
hierarchical_section_title: U3 (Hamburg U-Bahn) / History
caption_attribution_description: Deutsch: Karte der Linie U3 der Hamburger Hochbahn - Streckenführung bis zum 29.06.2009 English: Map of Hochbahn Hamburg route U3 until 29.06.2009
context_page_description: The U3 is a line of the Hamburg U-Bahn. The ring line with a length of 20.68 kilometres serves 25 stations. The first part opened in 1912. The line starts in Wandsbek-Gartenstadt and leads via Barmbek into the ring passing through the city center and back to Barmbek.
context_section_description: The ring line was built from 1906 to 1912 and had a length of 17,48 km and with 23 stations. The first part of the line which was first opened in February 1912, was the part between Rathaus via Hauptbahnhof and to Barmbek. On 2 January 1967 the first part of the line to Billstedt opened with the section leading to Horner Rennbahn. Since then, the U3 line was not a ring line anymore until the year of 2009.
  In 2009 eastern parts of U2 and U3 lines were swapped behind Berliner Tor. Before that, the U2 line led to Wandsbek-Gartenstadt. Since then, it ends in Mümmelmannsberg, and the U3 became a ring line again with a branch to Wandsbek-Gartenstadt.
caption: U3 before line swap in 2009
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