South Wales Main Line

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South Wales Main Line

Legend 0.00 London Paddington Great Western Main Line 77.25 Swindon Golden Valley Line M4 motorway Wootton Bassett GWML to Bristol Temple Meads M4 motorway Brinkworth Little Somerford Former Malmesbury branch Hullavington siding Alderton Tunnel Badminton Chipping Sodbury Tunnel Chipping Sodbury siding Westerleigh Junction Cross-Country Route Bristol and Gloucester Railway (Gloucester to Westerleigh Goods Depot) Coalpit Heath Winterbourne M4 motorway 117.75 Bristol Temple Meads 116.75 Lawrence Hill 116.25 Stapleton Road 113.00 Filton Abbey Wood 111.75 Bristol Parkway (Filton Abbey Wood to Patchway 1½ miles) Goods line to Avonmouth 113.00 Patchway 116.50 Pilning Severn Tunnel Caldicot Gloucester to Newport Line 123.50 Severn Tunnel Junction Magor Llanwern Flying junction Llanwern steelworks Goods line to Uskmouth East Usk Maindee Junction Welsh Marches Line Usk bridge 133.50 Newport Hillfield Tunnel Gaer Junction To Ebbw Vale Alexandra Dock Junction Ebbw Junction To Ebbw Vale Marshfield Freightliner (UK) terminal Long Dyke Junction Valley Lines via Cardiff Queen St 145.25 Cardiff Central River Taff Vale of Glamorgan Line and Valley Lines Cardiff Canton TMD Leckwith Junction Valley Lines via Radyr Llantrisant M4 motorway Pontyclun 156.25 Llanharan 161.50 Pencoed M4 motorway Vale of Glamorgan Line 165.25 Bridgend Maesteg Line M4 motorway 171.50 Pyle Water Street Junction M4 motorway Goods line to Tondu Margam TMD and Yard 177.50 Port Talbot Parkway M4 motorway 179.75 Baglan Baglan Bay 181.50 Briton Ferry Court Sart Junction 183.00 Neath Goods line to Aberpergwm Swansea District Line to Llanelli 187.00 Skewen M4 motorway 188.75 Llansamlet Llansamlet cutting Landore viaduct Swansea Loop North Junction West Wales Line Landore TMD Swansea Loop East Junction Hafod sidings 191.00 Swansea

The South Wales Main Line (Welsh: Prif Reilffordd De Cymru) is a branch of the Great Western Main Line in the UK. It diverges from the main line at Wootton Bassett near Swindon, first calling at Bristol Parkway, after which the line continues through the Severn Tunnel into South Wales.

Local services in Wales are operated by Arriva Trains Wales, with express trains from London provided by First Great Western. East of, and including, Cardiff some services are also provided by CrossCountry, along with First Great Western local services to Bristol and the South Coast.

Contents 1 History 2 Infrastructure 3 Associated routes 4 Future plans 5 Communities served 6 See also 7 References

[edit] History

The original route of the Great Western Railway between London and South Wales left the Bristol-bound Great Western Main Line at Swindon, proceeding via Stroud, Gloucester and Chepstow before rejoining the line as we know it today at Severn Tunnel Junction. This gave rise to the nickname 'Great Way Round'.

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 Bristol and the Severn Tunnel. This route leaves the one we know today at Wootton Bassett near Swindon rejoining it close to Patchway station.

The route used today was established in 1903 with the building of what is often known as the Badminton Line. This involved the construction of about 33 miles of new track including two tunnels at Alderton and Sodbury between Wootton Bassett and Patchway. Not only did this provide a more direct route for traffic to and from South Wales, the gradient was easier for coal trains to negotiate, and it was perceived that the line would be a boost to what was, at the time of building, the expanding port of Fishguard, which was the GWR's connection to a point of departure for the United States of America by liner.

[edit] Infrastructure

There are four tracks from Severn Tunnel Junction through Newport to Cardiff Central, with two tracks on the remaining sections. Multiple-aspect signals are controlled from several power signal boxes including Swindon, Bristol, Newport and Cardiff.

The line speed from London to the Severn Tunnel is 125 mph (200 km/h), and 90 mph (144 km/h) from Severn Tunnel to Swansea, although lower restrictions apply at various locations. There are plans to raise the speed in Wales following upgrading of track and signals.

[edit] Associated routes

Immediately west of Bristol Parkway is a complex of junctions that allow trains to leave and join the main line to South Wales. Trains from London to Bristol Temple Meads can run via the Badminton Line and Filton Abbey Wood, while trains from South Wales can use a curve between Patchway and Filton. The majority of these continue on the Wessex Main Line to Portsmouth, but some trains to London also use this route.

An alternative diversionary route exists for when the Severn Tunnel is closed. This takes trains from Severn Tunnel Junction to Gloucester, from where they can rejoin the main line either by using the Golden Valley Line to Swindon, or by using the Cross-Country Route and reversing at Bristol Parkway.

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

Some trains continue beyond Swansea onto the West Wales Line to Carmarthen. On the other hand, 50% of services terminate at Cardiff Central during peak hours.

The local service between Swansea and Cardiff is branded Swanline and those within Cardiff and to surrounding towns, including on the Maesteg Line, are referred to as Valley Lines.

[edit] Future plans

Traffic levels on the Great Western Main Line are rising faster than national average, with continued increases predicted. The now defunct Strategic Rail Authority produced a Route Utilisation Strategy for the Great Western Main Line in 2005 to propose ways of meeting this demand, Network Rail plan to implement a new study in 2008. In the meantime, their 2007 Business Plan includes the provision of extra platform capacity at Cardiff Central, Newport and Bristol Parkway, also resignalling and line speed improvements in South Wales, most of which would be delivered in 2010-2014.

[edit] Communities served

Communities served by trains from London:

• London
• Reading
• Didcot
• Swindon
• Bradley Stoke near Bristol
• Newport
• Cardiff
• Bridgend
• Port Talbot
• Neath
• Swansea

Communities served by only local trains:

• Patchway and Pilning near Bristol
• Magor and Rogiet near Newport
• Pontyclun
• Pencoed
• Pyle
• Baglan
• Briton Ferry
• Skewen
• Llansamlet
• Llanharan

[edit] See also

• Transport in Wales
• Transport in England

v • d • e Main line railways in Great Britain: High-speed main lines: High Speed 1 'Classic' main lines: Cross Country Route   East Coast Main Line   Great Eastern Main Line   Great Western Main Line   Midland Main Line   South Wales Main Line   West Coast Main Line

v • d • e Railway lines in Wales: InterCity lines: North Wales Coast Line -  South Wales Main Line (Ebbw Valley Line) Main lines: Gloucester-Newport Line -  Shrewsbury-Chester Line -  Welsh Marches Line Valley Lines: █  Butetown Branch - █ City Line - █ Coryton Line - █ Maesteg Line - █ Merthyr Line - █ Rhondda Line - █ Rhymney Line - █ Vale of Glamorgan Line Rural lines: Borderlands Line -  Cambrian Line -  Conwy Valley Line -  Heart of Wales Line -  West Wales Line

v • d • e Railway lines in South-West England and the "Great Western" zone : InterCity lines: Cross Country Route • Great Western Main Line Main lines: Bristol to Taunton Line • Cherwell Valley Line • Cornish Main Line • Gloucester-Newport Line • Reading to Plymouth Line • South Wales Main Line • Wessex Main Line • West of England Main Line • Reading to Basingstoke Line Commuter lines: Exeter-Exmouth "Avocet" Line • Greenford Branch Line • Severn Beach Line • Slough-Windsor & Eton Line Rural lines: Exeter-Barnstaple "Tarka" Line • Golden Valley Line • Heart of Wessex Line • Henley Branch Line • Looe Valley Line • Marlow Branch Line • Par-Newquay "Atlantic Coast" Line • Exeter-Paignton "Riviera" Line • St Ives Bay Line • Tamar Valley Line • Truro-Falmouth "Maritime" Line

[edit] References

• Kevin Robertson and David Abbott (1988). GWR The Badminton Line. Sutton Publishing Ltd. 
• (2006) Network Rail Passenger Timetable. London: Network Rail. 
• 2007 Business Plan, Network Rail, London
• First Great Western timetable for passenger services on South Wales Main Line, Dec 2006—May 2007
• First Great Western timetable for passenger services on South Wales Main Line, May—Dec 2007
• BBC News, Flying Arches, Llansamlet