Discusses improvements made in automatic system installed in 1913, switch plant, signal lights, motor-relays, stops, danger signals, daylight signals.
Automatic signalling plant of the Berlin elevated and subway line
Die selbsttatige Signalanlage der Berliner Hoch- und Untergrundbahn
Verkehrstechnik ; n 26
1925
6 pages
12 Figs.
Article (Journal)
German
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