ABCL

Abbreviated term for Automatic Barrier CrossingA cast or fabricated portion of the track layout which enables the rails of the two tracks to cross each other, while still providing support and guidance for s… More Locally Monitored.

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Absence Switch

A switch which, when operated, allows 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 to be un-staffed for a period, by registering telephone calls to that Signal BoxThe building in which the Signaller(s) is/are situated together with the […]

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Absolute Block

A system of controlling rail traffic, where (under normal operations) only one train is allowed in the 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 at a time. Proof of a section clearA Colour Light Signal that […]

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Acceptance

A Block SignallingA system of controlling rail traffic defined by Block Sections. Normally only one train is permitted in a Block Section. More term where a train is permitted to proceed towards the ‘accepting’ Signal BoxThe building in which the Signaller(s) is/are situated together with the control and indication system for the signalling. See also […]

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Accommodation Level Crossing

A private vehicular Level CrossingAn intersection at the same elevation of a road and one or more rail tracks. See Manned Level Crossing, Automatic Level Crossing and Open Crossing. More connecting land in the same ownership separated by a railway line.

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Advance

Alternative term for 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.

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Advance Warning Board (AWB)

A sign incorporating a St. George’s CrossIncorporated in a sign provided on the Approach To certain Automatic Level Crossings to inform the driver to regulate the speed of his train in order to observe… More provided on the Approach ToIn relation to equipment on or alongside the track, positioned such that a train passes the […]

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