Berlin U4
Line of the Berlin U-Bahn
Karte berlin u u4
Length 2.86 km (Script error mi)
Stations served 5
Profile KleinprofilScript error
Line opened 1 December 1910
Magdeburger Straße turning plant
BII branch line
0.0 Nollendorfplatz Berlin U1 Berlin U2 Berlin U3
0.9 Viktoria-Luise-Platz
1.7 Bayerischer Platz Berlin U7
2.4 Rathaus Schöneberg
2.9 Innsbrucker Platz Berlin S41 Berlin S42 (Ringbahn) Berlin S45 Berlin S46 Berlin S47
Former branch to service depot (Eisacktunnel)
Former Eisackstraße turning track

The U4 is a line of the Berlin U-Bahn, and the second shortest after the U55 with a length of 2.86 kilometres (Script error mi). It serves five stations, with only the termini being step-free.


In 1903, the then-independent town of Schöneberg, south-west of Berlin, planned to develop an underground railway line to improve public transportation. As the line promised less profit, the negotiations with the former Berliner HochbahngesellschaftScript error (Template:Lang-en) were unsuccessful. Consequently, Schöneberg started to build the line itself on December 8, 1908. Two years later, the construction was finished and, on December 1, 1910, the line was put into operation. Because this line was separate from the pre-existing underground railway, new equipment was required; Schöneberg chose to use tracks and trains compatible with the rest of the fledgeling network, allowing future connections.

Although Schöneberg owned the track, upon opening, it handed operations over to the Hochbahngesellschaft.

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