![]() An automatic level crossing equipped with half barriers, road traffic signals monitored by the train crew.Īutomatic Half Barrier Level Crossing. An automatic level crossing equipped with half barriers, road traffic signals and telephones communicating with the supervising signalbox.Īutomatic Half Barrier Level Crossing. Used for distinction from "closing" in the case of signal boxes (which might "close" at 6am every Sunday and re-open on Monday), and from "remove" (which might mean "move", as in "the signal will be removed to a new location 200 yards nearer the box").Ī term used in absolute block signalling where a signalman gives permission, by the block instrument, to the signalman at the preceding signal box for a train to proceed into the block section.Ī private vehicular level crossing connecting land in the same ownership.Ī running signal located beyond the starting signal, usually governing entrance to the block section ahead.Īutomatic Half Barrier Crossing. Verb used in signal alteration notices, etc, to describe the permanent taking out of use, and "taking away" of, a signalbox, signal, siding etc. An automatic level crossing equipped with half barriers and road traffic signals, the correct operation of which is monitored by the train driver. Method of signalling that allows more than one train to be present in a specific section of line at one time.Īutomatic Barrier Crossing Locally Monitored. Primarily associated with mechanical signalling, the absolute block principles also apply to TCB (see below). The section is normally between two adjacent signal boxes but intermediate block sections also exist. Method of signalling designed to ensure that only one train will be authorised to be present in a specific section of line at one time. The end of a station platform nearest the buffer stops where platforms at a terminal station are split for operational purposes.Ībsolute Block System. The end of a station platform nearest London or other major location where platforms at an intermediate station are split for operational purposes. In wide area power signal box territory the A end is that first encountered by a train proceeding in the down direction. crossover) worked by a single lever or control, the A end tradionally being the nearest to the signalbox, then B, C, etc. The end of a multiple sets of points (eg. Other parts have been gathered from a variety of sources and / or contributed by users of this web site.Ī B C D E F G H I J K L M N O P R S T U V W X Y They are included here with their permission. Parts of this list initially appeared in "Broad Survey" published by the Friends of the National Railway Museum in 2000. Where multiple definitions occur for the same acronym or term, the context in which it is used will normally make it obvious which definition applies. No attempt has been made in this list to indicate the likely geographic scope of such regional jargon as this can become blurred with the passage of time. This particularly applies to Railwayman's jargon (slang) terms where the term used sometimes varied between different parts of the country or between railway companies. Some of the terms listed will not have been in common (universal) use. On this page will be found a selection of acronyms and other terms relevant to signalling, train describers and to other material on this web site and used either within the railway industry or by the signalling fraternity. Instruments of this type were still used by British Railways well through that organisation's life span! In 1863 Charles Spagnoletti, Telegraph Superintendent of the Great Western Railway, devised a block instrument in which a disc swung to show the legend Train on Line or Line Clear in a little window.
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