Stammstrecke 1 (Munich U-Bahn)

The Stammstrecke 1 of the Munich U-Bahn is the first, of a total of three realized main routes, in the subway network of the Bavarian capital Munich. It runs mainly in north–south direction and is currently used by the two subway lines, the U3 and U6. Also, since 15 December 2013, the additional amplifier line, the U8, runs on Saturdays on the section Olympiazentrum-Scheidplatz. Between the subway stations Münchner Freiheit and Implerstraße, the lines U3 and U6 run on the same route, before, or after which they branch off and the two lines are then run each on a separate route. The mainline 1 has a total length of 41 kilometers and passes 42 subway stations. It does not run exclusively in Munich urban areas, but for a distance of about eight kilometers in the northern area of Garching. A large part of the northern section of the U6 runs above ground, the remaining part completely in tunnels.

On 19 October 1971, the operation was recorded on the first main line with the U6 line. In the following years, twelve expansions or extensions were put into operation at irregular intervals. Most recently, the section between the subway stations Olympia-Einkaufszentrum and Moosach was opened in 2010. An extension from Großhadern to Martinsried is planned, but a construction start has not been set.