Area Signalling Centre
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Area Signalling Centre (ASC) is a British term used to describe a modern signal box that controls a large area. Alternative names include Signalling Centre (SC), Signalling Control Centre (SCC) and Power Signal Box (PSB). A typical Signalling Centre may have replaced several dozen small traditional signal boxes.
[edit] Example
Wimbledon ASC, based in South West London, at Wimbledon. This ASC was built and opened partially in 1991 and now controls portions of railway line between London Waterloo Station, to Surbiton railway station, and London Waterloo to Barnes. The creation of Wimbledon ASC meant the closure in succession of the following signal boxes: Waterloo, Queenstown Road, West London Junction, Clapham Junction "A" box, (Windsor and Main Lines), Raynes Park, New Malden, Motspur Park, Epsom, Leatherhead, Wimbledon Park, Point Pleasant Junction, East Putney and Barnes.
The ASC had originally four panels: Panel 1: Waterloo Main & Local to Clapham Junction. Panel 2: Waterloo Windsor lines and Waterloo International to Clapham Junction (Windsor). Panel 3: Clapham Junction (Main) to New Malden, including LT lines Wimbledon to East Putney. Panel 4: Raynes Park Junction to Chessington, Motspur Park Junction to Leatherhead Junction. Panel 5 was added in 1999. Clapham Junction (Windsor) to Barnes.
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