An intermediate signal (abbreviation Zsig) is a railway signal and belongs to the main signals. It is placed in extended station areas between entry signal and exit signal and delimits a station section within the station. Intermediate signals can have the character of entry, exit or block signals, depending on their position in front of track junctions or separations.
The signal book of the Deutsche Bahn AG states the following:
Intermediate signals are main signals of the station that are not entry or exit signals.
Their following switch area extends up to the next main signal or a usual stopping place of the train, which is situated approximately in front of it – in case of several, at the last one. In some constellations, a signal can be an exit signal in one direction (e.g. on a branching line), but an intermediate signal in the direction of the other line. This is shown accordingly in the book timetable. This is also valid for exits into the opposite track. There the book timetable can say e.g.: “Zsig, into the opposite track Asig”.
In Switzerland, these signals are (consequently) called track section signals.