Block signal

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Block signals (H / V and newer Ks)

A block signal (abbreviation: Bksig ) is a railway signal and is one of the main signals . It delimits a train heading section or train reporting section of the free route . In a Zugfolgeabschnitt is only one must train are what is on main lines and most of branch lines by the block system is guaranteed. The line block keeps the block signal under lock and key at the next train sequence point ( block point or station ) until the train sequence section in between and the adjacent danger point distance (so-called signal train termination point , usually 50 meters behind the block signal) has been cleared of the train that last entered it. Signals at branch points and transfer points on the free route are also called block signals.

A block signal on a railway line with an automatic section block is called an automatic block signal (abbreviation: Sbk ). There are the types of central block and self-block. In conjunction with a track vacancy detection system , these block signals are automatically put into the running position before a train journey and are put into the stop position after the train has passed. Depending on the design, these signals indicate stop or travel in the basic position.