S9 (Berlin)

S9 is a line on the Berlin S-Bahn. It operates from Flughafen BER to Spandau through Berlin Hauptbahnhof (Berlin Central Station) over:

• a very short section of the Outer ring, opened in 1951 and electrified in 1983,
• a short section of the former Outer freight ring opened in the early 1940s and electrified in 1983,
• the Görlitz line, opened in 1866 and electrified in 1929,
• the Ring line, completed in 1877 and electrified in 1926 and, via a connecting curve,
• the Berlin–Wrocław railway, which at Berlin Ostbahnhof becomes
• the Berlin Stadtbahn to Charlottenburg,
• the Spandau Suburban Line.