In Block SignallingA system of controlling rail traffic defined by Block Sections. Normally only one train is permitted in a Block Section. More, a Stop SignalAny Signal capable of showing a Danger Aspect. More BeyondIn relation to equipment on or alongside the track, positioned such that a train reaches it after passing another defined item of equipment. See also Advance. More, and worked from, a Signal BoxThe building in which the Signaller(s) is/are situated together with the control and indication system for the signalling. See also Signalling Centre. More.
If no Advanced Starting SignalIn Block Signalling, a Stop Signal beyond the Starting Signal, and worked from the same Signal Box. An alternative term for Section Signal. More is provided, it is the Section SignalA Stop Signal controlling the entrance to a Block Section or Intermediate Block Section ahead. See also Home Signal, Starting Signal, Advanced Starting Signal. More.