The part of the Block InstrumentThe equipment in a Signal Box for the operation and indication of Block Signalling. More that provides the SignallerA person responsible for the operation of the Signalling System, to safely control the passage and regulation of trains, usually located in a Signal Box. More with a
continuous visual indication of the state of a line within a Block SectionThe section of line between one Section Signal and the next Home Signal. This term does not apply on a Track Circuit Block line. More.