English: At the east end in the direction of Alexanderplatz, the new section was equipped with the same safety technology for right-hand and left-hand travel. However, it is at least questionable whether the dispatch monitors, which are not required in each case, must always be in operation.
The red mast signs also exist in this form on the Buenos Aires subway, but the manufacturer Siemens was also involved there. In contrast to the suburban railroad, the subway has main signals with advance signaling only when there are special requirements.