The S3 is a service on the Munich S-Bahn network in Bavaria, Germany. It is operated by DB Regio Bayern (through its subsidiary S-Bahn München). The line runs from Mammendorf station in the west to Holzkirchen station in the southeast, passing through Pasing, central Munich (Hauptbahnhof), Munich East (Ostbahnhof), Giesing, and Deisenhofen.
Route and operations
The S3 is operated at 20-minute intervals between Maisach and Deisenhofen. Two out of three trains per hour continue from Maisach to Mammendorf and from Deisenhofen to Holzkirchen, resulting in alternating gaps of 20 and 40 minutes on the outer sections. The service uses DBAG Class 423 four-car electrical multiple units, typically as two coupled sets, though single sets are used in the evenings and on Sundays.
Trains reverse at Munich East station. To allow S-Bahn services from St Martinstraße to be inserted into the line while simultaneously reversing to run into the S-Bahn tunnel under central Munich (or vice versa), the section between Munich East station and the flying junction between München-Giesing and Fasangarten stations operates with traffic running on the left—one of the few such sections in Germany.
Infrastructure
The S3 uses several railway lines built at different times:
- From Mammendorf to Pasing over the Munich–Augsburg railway, opened in stages between 1 September 1839 and 4 October 1840 by the Munich–Augsburg Railway Company.
- From Pasing to the approaches to Munich Central Station over a section of the S-Bahn trunk line laid parallel to the Munich–Augsburg railway.
- The underground section of the S-Bahn trunk line from the approaches to Munich Central Station to Munich East station, opened on 1 May 1971.
- From Munich East station to Deisenhofen on the Munich East–Deisenhofen railway, opened by the Royal Bavarian State Railways on 10 October 1898 and electrified in March 1971.
- From Deisenhofen to Holzkirchen over the Munich–Holzkirchen railway, opened on 31 October 1857 and electrified in 1968.
History
The S3 was introduced on 28 May 1972, initially running between Mammendorf (then called Nannhofen) and Ismaning. The service was extended to Holzkirchen in 1975. Since December 2009, the S3 has run between Mammendorf and Holzkirchen.
Technical details
The line is electrified with 15 kV, 16.7 Hz AC overhead lines and carries the timetable number 999.3.
