line clear signal
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clear — I. adjective Etymology: Middle English clere, from Anglo French cler, from Latin clarus clear, bright; akin to Latin calare to call more at low Date: 13th century 1. a. bright, luminous b. cloudless; specifically less than one tenth covered … New Collegiate Dictionary
Signal passed at danger — (SPAD), in railway terminology, describes an event where a train has run beyond its allocated signal block without authority, as indicated by a lineside signal showing danger (typically a red light). It is a term primarily used within the British … Wikipedia
Signal Corps in the American Civil War — U.S. Army Signal Corps station on Elk Mountain, Maryland, overlooking the Antietam battlefield. The Signal Corps in the American Civil War comprised two organizations: the U.S. Army Signal Corps, which began with the appointment of Major Albert J … Wikipedia
Signal box — A signal box or signal cabin is a building from which railway signals and points are controlled. The term signal cabin is used in Ireland, parts of Scotland and in Australia while in North America, the term interlocking tower predominates.… … Wikipedia
Signal Mountain, Tennessee — Infobox Settlement official name = Signal Mountain, Tennessee settlement type = Town nickname = motto = imagesize = image caption = image mapsize = 250x200px map caption = Location of Signal Mountain, Tennessee mapsize1 = map caption1 =… … Wikipedia
Line array — The term line array means a speaker system that is made up of a varying number of vertically arranged units which give the effect of a single sound source with the same dimensions as the total of the unit of which is made up, the performance of… … Wikipedia
line-of-sight reception — A characteristic of high frequency radio signal transmissions that requires a clear path between the transmitter and the receiver. Typical line of sight reception ranges are indicated in the illustration. See also direct wave. Typical line of… … Aviation dictionary
Charing Cross (District Line) tube crash — The Charing Cross (District Line) tube crash occurred on 17 May 1938 at about 09:55 hours, between Charing Cross (now Embankment) and Temple stations. Six people were killed when a Circle Line service ran through a false clear signal into the… … Wikipedia
Kew railway line, Melbourne — VictorianRailwayLineInfobox type = mel name = Kew yearcommenced = yearopened = 19 December 1887 yearcompleted = yearclosed = 13 May 1957 fate = Parkland, VicRoads offices lengthkm = stations = Barker and Kew tracks = Single track users =… … Wikipedia
Maritime Line — 280px This mosaic at Falmouth Docks depicts the links between the railway and the area s maritime heritage Overview Type Heavy rail System National Rail … Wikipedia
Railway semaphore signal — One of the earliest forms of fixed railway signal is the semaphore. These signals display their different indications to train drivers by changing the angle of inclination of a pivoted arm . Semaphore signals were patented in the early 1840s by… … Wikipedia
