South Wales Main Line

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South Wales Main Line
Sodbury Railway Tunnel west exit in Old Sodbury (geograph 6554544).jpg
The entrance to the Chipping Sodbury Tunnel with the newly electrified overhead line equipment
Overview
StatusOperational
Owner Network Rail
Locale South Wales
South West England
Stations18
Service
TypeHeavy rail
System National Rail
Operator(s) Transport for Wales
CrossCountry
Great Western Railway
History
Opened1850;174 years ago (1850)
(Chepstow-Swansea)
1903;121 years ago (1903)
(Swindon-Patchway)
Technical
Line length84 miles 30 chains (135.79 km)
Number of tracksMainly double track, though quadruple track from Severn Tunnel Junction via Newport to Cardiff Central.
CharacterMain line
Track gauge 4 ft 8+12 in (1,435 mm) standard gauge
Electrification 25 kV 50 Hz AC OHLE
(Wootton Bassett to Cardiff Central)
Operating speedUp to 125 mph (201 km/h) in England
Up to 100 mph (161 km/h) in Wales
Route map
South Wales Main Line.png
(Click to expand)

The South Wales Main Line (Welsh : Prif Linell De Cymru), originally known as the London, Bristol and South Wales Direct Railway or simply as the Bristol and South Wales Direct Railway, is a branch of the Great Western Main Line in Great Britain. It diverges from the core London-Bristol line at Royal Wootton Bassett beyond Swindon, first calling at Bristol Parkway, after which the line continues through the Severn Tunnel into South Wales.

Contents

Great Western Railway operates Class 800 trains between London and South Wales, and "Castle class" High Speed Trains on services between Cardiff and South West England. CrossCountry provides services from Cardiff to Nottingham via Severn Tunnel Junction and thence the Gloucester to Newport Line via Gloucester and Birmingham. Transport for Wales operates services between South Wales, and North Wales and the Midlands on the line.

The line between Swindon and Cardiff Central was electrified using the 25 kV AC overhead system as part of the larger electrification of the Great Western Main Line.

History

The original route of the Great Western Railway (GWR) between London and South Wales, after the opening of Brunel's Chepstow Railway Bridge in 1852, left the Bristol-bound Great Western Main Line at Swindon, proceeding via Stroud, Gloucester and Chepstow before rejoining the present line at Severn Tunnel Junction. This gave rise to the nickname 'Great Way Round'. [1] [2]

In 1886, the opening of the Severn Tunnel brought the opportunity of a more direct route to South Wales, and trains from Swindon to Newport and beyond were routed via Bath, Bristol and the tunnel.

The route used today was established in 1903 with the building of what is often known as the Badminton Line. [3] This involved the construction of about 33 miles (53 km) of new track, and tunnels at Alderton and Sodbury. The new line left the Bath line beyond Swindon at what is now Royal Wootton Bassett, rejoining the earlier route north of Bristol near Patchway. Not only did this provide a more direct route for traffic to and from South Wales, the gradients were easier for coal trains to negotiate, and it was thought that the line would be a boost to what was, at the time of building, the expanding port of Fishguard. This was the GWR's connection with trans-Atlantic ocean liner departures.

21st century

In 2005, the Strategic Rail Authority produced a Route Utilisation Strategy for the Great Western Main Line in 2005 to propose ways of meeting increased traffic levels. Network Rail's 2007 Business Plan included the provision of extra platform capacity at Cardiff Central, Newport and Bristol Parkway, together with resignalling and line speed improvements in South Wales, most of which would be delivered in 2010–2014.

Reading station underwent a major redevelopment, being reopened in July 2014. [4]

Electrification

Electrification work at Cardiff Central in October 2019 Electrification work at Cardiff Central.png
Electrification work at Cardiff Central in October 2019

The South Wales Main Line was one of the last of the major inter-city routes in Great Britain to remain un-electrified. The government announced in 2012 a scheme to electrify the South Wales Main Line as part of a wider scheme of electrification on the Great Western Main Line. The line from London to Cardiff was fully electrified by Christmas 2019. [5]

The Hitachi Super Express trains bought for Great Western inter-city services are predominantly electric units, but a portion of the fleet are dual power source electro-diesel bi-mode trains, which enabled services to operate before line electrification is complete. The bi-mode trains will allow inter-city services to continue to operate from London all the way to Carmarthen in the future. The Super Express trains were expected to bring an estimated 15% increase in capacity during the morning peak hours. Electrification cut journey times between Swansea and London by an estimated 20 minutes, although electrification will not extend west of Cardiff to Swansea, Carmarthen or Pembroke Dock, and services on the line to Brighton, Portsmouth Harbour and Taunton will continue to be operated by diesel trains, as the Bristol to Exeter Line and the Wessex Main Line will not be electrified. [6]

Infrastructure

Four track railway approaching Cardiff from Newport, prior to electrification South Wales Main line heading northeast, Rumney, Cardiff.jpg
Four track railway approaching Cardiff from Newport, prior to electrification

There are four tracks from Severn Tunnel Junction through Newport to Cardiff Central, with two tracks on the remaining sections. [7] Multiple-aspect signals are controlled from several power signal boxes including Swindon, Bristol and two in Cardiff. Over the August Bank Holiday weekend 2016, control of the signals between Westerleigh Junction and Pilning was switched over to the Thames Valley Signalling Centre. These signals now carry the prefix 'BL'.[ citation needed ]

The maximum line speed from Wootton Bassett Junction to Coalpit Heath is 125 mph (200 km/h); [8] 90 mph (145 km/h) from Coalpit Heath to Newport; 90 mph (145 km/h) from Newport to east of Bridgend; [9] 75 mph (120 km/h) from east of Bridgend to Swansea Loop North junction (with a small section of 100 mph (160 km/h) track through Pyle station); and 40 mph (65 km/h) from Swansea Loop North Junction to Swansea. [7]

Associated routes

A diversionary route exists if the Severn Tunnel is closed. This takes trains from Severn Tunnel Junction to Gloucester, from where they can rejoin the main line either via the Golden Valley Line to Swindon, or take the Cross-Country Route and reverse at Bristol Parkway.

If the line is closed between Cardiff Central and Bridgend, an alternative route exists along the Vale of Glamorgan Line.

Half of peak High Speed Trains and most off peak trains continue from Cardiff Central to Swansea, with a few continuing to Carmarthen or in summer, Pembroke Dock.

The local service between Swansea and Cardiff is branded Swanline. The urban network within and surrounding Cardiff, including the Maesteg Line, is referred to as Valley Lines.

Communities served

Accidents and incidents

See also

Related Research Articles

<span class="mw-page-title-main">Great Western Railway</span> British railway company (1833–1947)

The Great Western Railway (GWR) was a British railway company that linked London with the southwest, west and West Midlands of England and most of Wales. It was founded in 1833, received its enabling act of Parliament on 31 August 1835 and ran its first trains in 1838 with the initial route completed between London and Bristol in 1841. It was engineered by Isambard Kingdom Brunel, who chose a broad gauge of 7 ft —later slightly widened to 7 ft 14 in —but, from 1854, a series of amalgamations saw it also operate 4 ft 8+12 in standard-gauge trains; the last broad-gauge services were operated in 1892.

<span class="mw-page-title-main">Severn Tunnel</span> Tunnel linking the South of England and Wales

The Severn Tunnel is a railway tunnel in the United Kingdom, linking South Gloucestershire in the west of England to Monmouthshire in south Wales under the estuary of the River Severn. It was constructed by the Great Western Railway (GWR) between 1873 and 1886 for the purpose of dramatically shortening the journey times of their trains, passenger and goods alike, between South Wales and Western England. It has often been regarded as the crowning achievement of GWR's chief engineer Sir John Hawkshaw.

<span class="mw-page-title-main">Cardiff Central railway station</span> Grade II listed railway station in Cardiff, Wales

Cardiff Central is a major station on the South Wales Main Line. It is located in the capital of Wales, Cardiff, 170 miles 30 chains (274 km) down the line from London Paddington, via Stroud. It is one of the city's two urban rail network hubs, along with Cardiff Queen Street. Opened in 1850 as Cardiff station, it was renamed Cardiff General in 1924 and then Cardiff Central in 1973.

<span class="mw-page-title-main">Great Western Main Line</span> Important railway corridor in England, UK

The Great Western Main Line (GWML) is a main line railway in England that runs westwards from London Paddington to Bristol Temple Meads. It connects to other main lines such as those from Reading to Penzance and Swindon to Swansea. Opened in 1841, it was the original route of the first Great Western Railway which was merged into the Western Region of British Railways in 1948. It is now a part of the national rail system managed by Network Rail with the majority of passenger services provided by the current Great Western Railway franchise.

<span class="mw-page-title-main">Severn Tunnel Junction railway station</span> Railway station in Rogiet, Wales

Severn Tunnel Junction railway station is a minor station on the western side of the Severn Tunnel in the village of Rogiet, Monmouthshire, Wales. It is 123.5 miles (198.8 km) from London Paddington and lies at the junction of the South Wales Main Line from London and the Gloucester to Newport Line.

<span class="mw-page-title-main">Golden Valley line</span> Railway line in England

The Golden Valley line is the popular name given to the railway line between Swindon, Gloucester and Cheltenham Spa in England.

<span class="mw-page-title-main">Newport railway station</span> Railway station in Newport, Wales

Newport is the second-busiest railway station in Wales. It is situated in Newport city centre and 158 miles 50 chains (255.3 km) from London Paddington, via Stroud.

<span class="mw-page-title-main">Pilning railway station</span> Railway station near Bristol, England

Pilning railway station is a minor station on the South Wales Main Line near Pilning, South Gloucestershire, England. It is 10 miles (16 km) from Bristol Temple Meads and is the last station on the English side before the Severn Tunnel through to Wales. It is managed by Great Western Railway, who provide the two train services per week from the station.

<span class="mw-page-title-main">Gloucester–Newport line</span> UK railway line

The Gloucester–Newport line is a railway line that runs along the west bank of the River Severn in the United Kingdom between Gloucester and Newport.

<span class="mw-page-title-main">Filton Abbey Wood railway station</span> Railway station in Gloucestershire, England

Filton Abbey Wood railway station serves the town of Filton in South Gloucestershire, England; it is located 4.4 miles (7.1 km) from Bristol Temple Meads. There are four platforms but minimal facilities. The station is managed by Great Western Railway that operates all services that call here. The general service level is eight trains per hour: two to South Wales, two to Bristol Parkway, two toward Weston-super-Mare and two toward Westbury.

<span class="mw-page-title-main">Swindon railway station</span> Railway station in Wiltshire, England

Swindon railway station is on the Great Western Main Line in South West England, serving the town of Swindon, Wiltshire. The station is 77 miles 23 chains down the line from the zero point at London Paddington and lies between Didcot Parkway and Chippenham. It is managed by Great Western Railway, which also operates all of the services from the station. It is the busiest station in Wiltshire, and the fifth busiest station in South West England.

<span class="mw-page-title-main">Patchway railway station</span> Railway station in Gloucestershire, England

Patchway railway station is on the South Wales Main Line, serving the town of Patchway and village of Stoke Gifford in South Gloucestershire, England. It is 6 miles (10 km) from Bristol Temple Meads. Its three letter station code is PWY. It is managed by Great Western Railway, who provide all train services at the station; there is generally a train every hour in each direction between Cardiff Central and Taunton.

The South Wales Railway was a main line railway which opened in stages from 1850, connecting the Great Western Railway from Gloucester to South Wales. It was constructed on the broad gauge. An original aspiration was to reach Fishguard to engender an Irish ferry transit and transatlantic trade, but the latter did not materialise for many years, and never became an important sector of the business. Neyland was the western terminus of the line until 1906.

<span class="mw-page-title-main">Bristol and South Wales Union Railway</span>

The Bristol and South Wales Union Railway was built to connect Bristol, England, with south Wales. The route involved a ferry crossing of the River Severn but was considerably shorter than the alternative route through Gloucester. The ferry was replaced by the Severn Tunnel in 1886 but part of the route continues to be used, forming parts of the Cross-Country Route and the South Wales Main Line.

<span class="mw-page-title-main">Severn Bridge Railway</span> United Kingdom legislation

The Severn Bridge Railway was a railway company which constructed a railway from Lydney to Sharpness in Gloucestershire, England. It was intended chiefly to give access for minerals in the Forest of Dean to Sharpness Docks, and the company built a long bridge, 1,387 yards (1,268 m) in length, over the River Severn. The line opened in 1879.

<span class="mw-page-title-main">Great Western Main Line upgrade</span> Major electrification project by Network Rail

In the 2010s Network Rail modernised the Great Western Main Line, the South Wales Main Line, and other associated lines. The modernisation plans were announced at separate times but their implementation overlapped in the 2010s.

<span class="mw-page-title-main">Wootton Bassett Junction railway station</span> Former railway station in England

Wootton Bassett Junction railway station, formerly Wootton Bassett railway station, was a junction station in Wootton Bassett where the Great Western and South Wales Main Lines diverge. Opened in 1841, it closed in 1965.

Rail transport in Cardiff has developed to provide connections to many other major cities in the United Kingdom, and to provide an urban rail network for the city and its commuter towns in southeast Wales. Today, there are three train operating companies in Cardiff: Great Western Railway, CrossCountry and Transport for Wales.

<span class="mw-page-title-main">Westerleigh Junction</span> Railway junction in Gloucestershire, England

Westerleigh Junction is a railway junction in Gloucestershire, England, where the Cross Country Route (XCR) from York to Bristol Temple Meads meets the South Wales Main Line (SWML) from London Paddington to Swansea, near the village of Westerleigh.

The Badminton railway line is a railway line opened in 1903 by the Great Western Railway between the Great Western Main Line at Wootton Bassett in Wiltshire and Patchway and Filton, north of Bristol, England. Forming the eastern section of the South Wales Main Line, it shortened the distance between South Wales and London for heavy mineral traffic and for express passenger trains; it relieved congestion on the line through Bath.

References

  1. "South Wales Coastal" (PDF). Dovetail Games. Retrieved 2 October 2017.
  2. "The Story of the G.W.R." Railway Wonders of the World. Retrieved 2 October 2017.
  3. Kevin Robertson and David Abbott (1988). GWR The Badminton Line – A portrait of a railway. Sutton Publishing Ltd. ISBN   0-86299-459-4.
  4. "Queen opens revamped Reading railway station". BBC News. 17 July 2014. Retrieved 10 February 2023.
  5. "GWML electrification dates revealed". www.railtechnologymagazine.com. Retrieved 16 October 2017.
  6. "Britain's Transport Infrastructure, Rail Electrification" (PDF). Department for Transport. Archived from the original (PDF) on 23 January 2017. Retrieved 16 September 2013.
  7. 1 2 "Network Rail – Wales Route Utilisation Strategy (November 2008)" (PDF). Archived from the original (PDF) on 7 June 2011. Retrieved 16 September 2013.
  8. "Western Route Sectional Appendix December 2021" (PDF). Network Rail . 4 September 2021. Retrieved 21 December 2021.
  9. Network Rail. "Network Rail: Route specifications 2011" (PDF). Network Rail. Archived from the original (PDF) on 30 January 2015. Retrieved 22 March 2015.
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