End-of-train detectors belong to necessary basic technology of train protection. This installation recognizes the beginning and the end of trains crossing. Therefore, this is a system of point by point detection of trains. On the one hand these detectors enable that several trains can run safely on the same track. Furthermore, these detectors fulfil other important functions which we will explain in this chapter as well.
End-of-train detectors are the limit of a track section. If a train passes this detector by its head, then the following track section becomes “occupied”. When the following track section is likewise the beginning of the next block, then the signal gets the signal aspect “halt”. If the end of train finally passes the detector, then the last track section gets the status “not assigned”.