![[track map goes here]](mapdebea.png)
This map shows the mainlaine and S-bahn railways in central Berlin, until and including the (inner) ring line. U-bahn and trams are not shown.
At Westhafen and Wedding tunnels for connections from the S-bahn ring towards the Hauptbahnhof were constructed when the ring was rebuilt after the reunification, circa 2000. Political willingness to actually fund such a connection seems to have been unstready, thouch. At the time of this writing the German Wikipedia appears to claim that construction could start "any year now". In any case, it is nice to think that the reconstruction was done providently enough to include works for later connections that might be realized later.
The non-electified tracks north of Warschauer Straße are home to Talgo night train stock. They are only reachable via a connecting track from Lichtenberg.
The freight tracks along the S-bahn ring from Westkreuz to Tempelhof were recently (re)built when I observed them in 2002. In 2009 those same tracks were heavily overgrown in places. There was a freight station alongside Innsbrucker Platz in 2002, but all tracks except for the two through ones had been removed in 2009. The single freight track from Tempelhof to Neukölln (and further on to Schöneweide) seemed to be in use in 2009.
A major reconstruction of the Ostkreuz area were in progress when I visited in 2009. As part of this, the curve that connects Warschauer Straße and Treptower Park will be closed in late 2009, reopening several years later without any Ostkreuz platform. In the mean time, the only connection between the Stadtbahn and the Ringbahn tracks will be the Charlottenburg–Halensee curve (apart from going to Wannsee and reversing via the reduced-profile north-south tunnel to Gesundbrunnen).
| Ring line | |
| All (except below) | Personal observation June/July 2009 |
|---|---|
| Gesundbrunnen triangle | Crossovers in the southern long-distance leg are from Google Maps (2009) only. |
| Greifswalder Straße freight stration | South-easteren end observed in August 2002, checked with Google Maps 2009. |
| Frankfurter Allee freight station | Observed in August 2002, corrections from Google Maps 2009. |
| Tempelhof freight station | Tracks marked in light green color are from Google Maps (2009)
only. The two or tree easternmost switches observed in August 2009, checked with Google Maps 2009. |
| Schöneberg | Connection between upper/lower level freight tracks observed in August 2002, confirmed with Google Maps 2009 |
| Halensee | Crossover between S-bahn and (disuses) freight tracks comes from Google Maps (2009) only. |
| North–south S-bahn | |
| All (except below) | Personal observation June/July 2009 |
| Nordbahnhof | Uncertain; observed only from southbound track, June 2009 |
| Anhalter Bahnhof | There may or may not be a crossover that lets trains from the stub-ended track 1 go toward Schöneberg/Wannsee. |
| North–south long-distance | |
| All (except below) | Personal observation June/July 2009 |
| Hauptbahnhof (lower level) | The platform track fanouts are in tunnels and difficult to observe. Reconstructed from scattered glimpses (June/July 2009) with an assumption of symmetry. Two crossovers in the north-east corner are not finished; there are sleepers and rail clips but no actual rails. I have drawn them with "under construction" light blue, though construction is probably not ongoing. There may be more such unfinished crossovers in the layout. |
| Potsdamer Platz – Südkreuz | I think I glimpsed a crossover between the two southbound long-distance tracks, just inside the tunnel mouth. Marked as uncertain becuase it makes relatively little sense to have a crossover just there, and because there is definitely no matching crossover between the northbound tracks. |
| Stadtbahn (east–west S-bahn and long-distance | |
| All | Personal observation June/July 2009 |