**'()是柏林城市快鐵(S-Bahn)的多条线路共用的穿过柏林城市中心区的隧道,全长5884米,宽3.43米,高3.83米,1933年动工,1939年建成通车。
参考文献
外部链接
- [http://s-bahn-berlin.de/ S-Bahn Berlin] (German)
- [https://web.archive.org/web/20110722221426/http://stadtregion.org/bahn/bhf/bs152.htm Railway stations of the North–South Tunnels] (German)
- [https://web.archive.org/web/20100216022246/http://www.berliner-verkehrsseiten.de/s-bahn/Strecken/Elektrifizierung/S_21/hauptteil_s_21.html About the planning of the S21] (German)
- [http://www.eisenbahn-tunnelportale.de/lb/inhalt/tunnelportale/6032.html#nord-sued Pictures of the Tunnel Portals] (German)
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