The
Berlin S-Bahn is a
rapid transit railway system in and around
Berlin, the capital city of
Germany. It has been operated under this name since December 1930, having been previously called the special tariff area
Berliner Stadt-, Ring- und Vorortbahnen (Berlin cross-city, circular, and suburban railways). It complements the
Berlin U-Bahn and is the link to many outer-Berlin areas, such as
Berlin Schönefeld Airport.