S3 (Berlin)
…formerly Erkner ↔ Ostbahnhof) was extended westwards to Spandau. Then, it was temporarily shortened again to Ostkreuz. The S3 was created along with the S1 and S2 on 9 January 1984, when the Berliner Verkehrsbetriebe (BVG) took over the S-Bahn network from the East German Deutsche Reichsbahn (DR) in West…