Severn Bridge Junction
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Severn Bridge Junction
Severn Bridge Junction is the area of railway lines just south east of Shrewsbury railway station, in Shropshire, England. It is controlled by a mechanical interlocked signal box of the same name, which is the largest operational mechanical signal box in the world.Network Rail
Refurb of World's largest working mechanical signal box completes
The signalling area code is 'SBJ.'


Background

The complexity of the railway system in the area is brought about by the convergence of five major lines at , built in the

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England
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe by the North Sea to the east and the English Channel to the south. The country covers five-eighths of the island of Great Britain, which lies in the North Atlantic, and includes over 100 smaller islands, such as the Isles of Scilly and the Isle of Wight. The area now called England was first inhabited by modern humans during the Upper Paleolithic period, but takes its name from the Angles, a Germanic tribe deriving its name from the Anglia peninsula, who settled during the 5th and 6th centuries. England became a unified state in the 10th century and has had a significant cultural and legal impact on the wider world since the Age of Discovery, which began during the 15th century. The English language, the Anglican Church, and Engli ...
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Severn Valley Railway
The Severn Valley Railway is a heritage railway in Shropshire and Worcestershire, England. The heritage line runs along the Severn Valley from Bridgnorth to Kidderminster, following the course of the River Severn for much of its route, and crossing the river on the historic Victoria Bridge. The railway is the sixth-longest standard gauge heritage line in the United Kingdom. Train services are hauled predominantly by steam locomotives, with vintage diesel locomotives hauling occasionally. Diesel locomotives are also used for engineering trains, to replace failed steam locomotives at short notice, and during periods of high fire risk. The railway hosts numerous special events throughout the year, including both steam and diesel galas. History Commercial history The Severn Valley Railway was built between 1858 and 1862, and linked Hartlebury, near Droitwich Spa, with Shrewsbury, a distance of . Important stations on the line were , , and within Worcestershire; and , , , , , ...
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Shrewsbury Traction Maintenance Depot
Shrewsbury TMD is a railway traction maintenance depot (TMD) situated in Coleham, Shrewsbury, England. The TMD forms part of Coleham Depot, a permanent way depot operated by Network Rail. The code for the TMD is 'SB'. Location The depot is situated at Sutton Bridge Junction, where the Cambrian Line connects with the Welsh Marches Line, approximately to the south of Shrewsbury railway station. The TMD was constructed in 2008 on the site of rarely used permanent way sidings - which had themselves been built on the site of the former extensive joint GWR/LNWR goods yard - as part of the ERTMS project on the Cambrian Line. The depot became the base for Network Rail 97/3s (former Class 37 locomotives) for ERTMS testing on the Cambrian Line. The locomotives arrived in 2009 (see the allocation section below). The new maintenance depot consists of a single-road inspection shed with an additional siding to one side to run round locomotives/store additional locomotives. There is also a ...
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Motive Power Depot
The motive power depot (MPD) or locomotive depot, or traction maintenance depot (TMD), is the place where locomotives are usually housed, repaired and maintained when not being used. They were originally known as "running sheds", "engine sheds" or, for short, just sheds. Facilities are provided for refuelling and replenishing water, lubricating oil and grease and, for steam engines, disposal of the ash. There are often workshops for day to day repairs and maintenance, although locomotive building and major overhauls are usually carried out in the locomotive works. (Note: In American English, the term ''depot'' is used to refer to passenger stations or goods (freight) facilities and not to vehicle maintenance facilities.) German practice The equivalent of such depots in German-speaking countries is the ''Bahnbetriebswerk'' or ''Bw'' which has similar functions, with major repairs and overhauls being carried out at ''Ausbesserungswerke''. The number of these reduced drastic ...
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Listed Building
In the United Kingdom, a listed building or listed structure is one that has been placed on one of the four statutory lists maintained by Historic England in England, Historic Environment Scotland in Scotland, in Wales, and the Northern Ireland Environment Agency in Northern Ireland. The term has also been used in the Republic of Ireland, where buildings are protected under the Planning and Development Act 2000. The statutory term in Ireland is " protected structure". A listed building may not be demolished, extended, or altered without special permission from the local planning authority, which typically consults the relevant central government agency, particularly for significant alterations to the more notable listed buildings. In England and Wales, a national amenity society must be notified of any work to a listed building which involves any element of demolition. Exemption from secular listed building control is provided for some buildings in current use for worship, ...
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Railway Magazine
''The Railway Magazine'' is a monthly British railway magazine, aimed at the railway enthusiast market, that has been published in London since July 1897. it was, for three years running, the railway magazine with the largest circulation in the United Kingdom, having a monthly average sale during 2009 of 34,715 (the figure for 2007 being 34,661). It was published by IPC Media until October 2010, with , and in 2007 won IPC's 'Magazine of the Year' award. Since November 2010, ''The Railway Magazine'' has been published by Mortons of Horncastle. History ''The Railway Magazine'' was launched by Joseph Lawrence and ex-railwayman Frank E. Cornwall of Railway Publishing Ltd, who thought there would be an amateur enthusiast market for some of the material they were then publishing in a railway staff magazine, the ''Railway Herald''. They appointed as its first editor a former auctioneer, George Augustus Nokes (1867–1948), who wrote under the pseudonym "G. A. Sekon". He quickly bui ...
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Melbourne, Australia
Melbourne ( ; Boonwurrung/Woiwurrung: ''Narrm'' or ''Naarm'') is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in both Australia and Oceania. Its name generally refers to a metropolitan area known as Greater Melbourne, comprising an urban agglomeration of 31 local municipalities, although the name is also used specifically for the local municipality of City of Melbourne based around its central business area. The metropolis occupies much of the northern and eastern coastlines of Port Phillip Bay and spreads into the Mornington Peninsula, part of West Gippsland, as well as the hinterlands towards the Yarra Valley, the Dandenong and Macedon Ranges. It has a population over 5 million (19% of the population of Australia, as per 2021 census), mostly residing to the east side of the city centre, and its inhabitants are commonly referred to as "Melburnians". The area of Melbourne has been home to Aboriginal Victorians ...
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Spencer Street Railway Station
Southern Cross railway station (until 2005 known as Spencer Street station) is a major railway station in Docklands, Victoria, Docklands, Melbourne. It is on Spencer Street, Melbourne, Spencer Street, between Collins Street, Melbourne, Collins and La Trobe Street, Melbourne, La Trobe Streets, at the western edge of the Melbourne city centre, Melbourne central business district. The Docklands Stadium sports arena is 500 metres north-west of the station. The station is owned, operated and maintained by Civic Nexus, a subsidiary of IFM Investors and operating as Southern Cross Station Pty Ltd, under a 30-year lease to 2036 from the Victorian State Government, as part of a public-private partnership. Southern Cross Station Pty Ltd contracts Infranexus Management Pty Ltd (Infranexus) for management services. Infranexus is also wholly owned by IFM. The station is the terminus of the List of regional railway stations in Victoria, state's regional railway network operated by V/Line, ' ...
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Rail Transport In Great Britain
The railway system in Great Britain is the oldest railway system in the world. The first locomotive-hauled public railway opened in 1825, which was followed by an era of rapid expansion. Most of the track is managed by Network Rail, which in 2017 had a network of of standard-gauge lines, of which were electrified. These lines range from single to quadruple track or more. In addition, some cities have separate metro, light rail and tram systems (including the extensive and historic London Underground). There are also many private railways (some of them narrow-gauge), which are primarily short lines for tourists. The main rail network is connected with that of continental Europe by the Channel Tunnel and High Speed 1 (originally the Channel Tunnel Rail Link), which fully opened in 1994 and 2007 respectively. In 2019, there were 1.738 billion journeys on the National Rail network, making the British network the fifth most used in the world (Great Britain ranks 23rd in ...
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Interlocking
In railway signalling, an interlocking is an arrangement of signal apparatus that prevents conflicting movements through an arrangement of tracks such as junction (rail), junctions or crossings. The signalling appliances and Track (rail transport), tracks are sometimes collectively referred to as an ''interlocking plant''. An interlocking is designed so that it is impossible to display a signal to proceed unless the route to be used is proven safe. Interlocking is a safety measure designed to prevent signals and Railroad switch, points/switches from being changed in an improper sequence. For example interlocking would prevent a signal from being changed to indicate a diverging route, unless the corresponding points/switches had been changed first. In North America, the official railroad definition of interlocking is: "''An arrangement of signals and signal appliances so interconnected that their movements must succeed each other in proper sequence''". Configuration and use A ...
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Welsh Slate
The existence of a slate industry in Wales is attested since the Roman period, when slate was used to roof the fort at Segontium, now Caernarfon. The slate industry grew slowly until the early 18th century, then expanded rapidly until the late 19th century, at which time the most important slate producing areas were in northwest Wales, including the Penrhyn Quarry near Bethesda, the Dinorwic Quarry near Llanberis, the Nantlle Valley quarries, and Blaenau Ffestiniog, where the slate was mined rather than quarried. Penrhyn and Dinorwig were the two largest slate quarries in the world, and the Oakeley mine at Blaenau Ffestiniog was the largest slate mine in the world. Slate is mainly used for roofing, but is also produced as thicker slab for a variety of uses including flooring, worktops and headstones.Lindsay p. 133 Up to the end of the 18th century, slate was extracted on a small scale by groups of quarrymen who paid a royalty to the landlord, carted slate to the port ...
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