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A Driving Van Trailer or '''DVT''' is a purpose-built railway vehicle that allows the driver to operate a Locomotive from the other end of a train. Trains operating with a DVT therefore do not require the locomotive to run round to the opposite end of the train. Unlike many other control cars, DVTs resemble locomotives (specifically, classes 90 and 91 ) and thus when the train is operating in "push" mode it does not appear to be traveling backwards. DEVELOPMENT DVTs and locomotives operate in Push-pull formation utilising a Time-Division Multiplexer to send control signals along the "RCH" Jumper Cable s that run the length of the train. This allows the same cables to be used for lighting and the public address system, as well as driver-guard signalling. In addition to the driver's cab, the DVT has luggage space and a guard's office. When a train is operated by a DVT, the control signals are encoded and multiplexed onto the cables by the TDM equipment in the DVT. At the locomotive, these signals are demultiplexed by the TDM equipment, and the signals are used to control the locomotive. The Air Braking system is operated directly from whichever cab the driver is driving from. If the TDM fails and cannot be reconfigured, the train may still operate, but if the DVT is leading, it will be necessary to uncouple the locomotive and attach it to the front of the train. The British DVT was developed from the DBSO , but unlike its predecessor, it was built specifically for this purpose. The original DVTs were designed to be used with British Rail Mark 2 D, E & F and British Rail Mk 3 Coaches , and the second design with British Rail Mk 4 Coaches , which have a narrower profile. This enables it to be converted to Tilting Operation if required in the future. MK3 DVTs can be seen in service in the UK with the EWS Company Train , Virgin Cross Country , Virgin West Coast and 'one' Anglia. Class 67, Class 86, Class 87 and Class 90's provide the power to these DVTs. The BR MK4 DVT is operated by GNER and powered by Class 91's and a Class 89 once operated between London Kings Cross and Leeds. MK3 DVT VIRGIN TRAINS VIRGIN WEST COAST Operate push-pull peak time services between London Euston and Birmingham New Street and standby duties, more recently saw the set visit Preston due to a lack of Pendolinos. VIRGIN CROSS COUNTRY Operate push-pull services between Manchester Piccadilly and Birmingham New Street when is shortage of Voyagers. The DVTs are hired from EWS. ONE ANGLIA Operate push-pull services between London Liverpool Street and Norwich. These DVTs were used by Virgin West Coast until the Pendolinos were brought in. All DVTs needed refurbishing when they came off lease. DVT at Norwich station]] DVT at Leeds station]] Mark 4 DVT ''Further details to follow'' DVT 82221 was destroyed in the Selby Rail Crash on February 28 , 2001 . EWS EWS operate a Mk.3 DVT as part of their EWS Company Train . |
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