Rhondda line

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Rhondda line
Railway at Treforest - geograph.org.uk - 4494287.jpg
A pair of Arriva Trains Wales Class 142s at Treforest, with a Class 150 on the opposite line in the background.
Type Heavy Rail
System National Rail
Locale Cardiff
Rhondda Cynon Taff
Termini Cardiff
51°28′34″N 3°10′44″W / 51.4760°N 3.1790°W / 51.4760; -3.1790 (Cardiff Central station)
51°40′20″N 3°32′10″W / 51.6722°N 3.5361°W / 51.6722; -3.5361 (Treherbert station)
Owner Network Rail
Number of tracks Single trackTreherbert to Porth with a passing loop at Ystrad
Double trackPorth to Cardiff
Track gauge 1,435 mm (4 ft 8 12 in) standard gauge

Rhondda line
Rhondda and
Swansea Bay Railway
Ton Pentre
Ystrad Rhondda
Dinas Rhondda
Merthyr line and
Aberdare Line
Treforest Estate
(closed Sundays)
Taffs Well
City Line
Coryton Line and
Rhymney line
Cardiff Queen Street
Butetown branch line
Cardiff Central
South Wales Main Line
Vale of Glamorgan Line

The Rhondda line is a commuter railway line in South Wales from Cardiff to Treherbert. The line follows the Merthyr line as far as Pontypridd, where it then diverges to continue along the Rhondda Valley.

The places served by the line are listed below:

The line is currently operated by Arriva Trains Wales (ATW) as part of the Valley Lines network. ATW replaced the previous franchise, Wales & Borders in December 2003.

The first section of the line, as far as Pontypridd, is historically part of the Taff Vale Railway, from Cardiff to Merthyr Tydfil. At Pontypridd the Rhondda branch diverges and follows the course of the Rhondda Valley. It was single-tracked beyond Porth in the early 1980s, just prior to the commencement of the revival of the Valley Lines network. By 1986 a passing loop was constructed at Ystrad Rhondda station (itself newly built, with the original station of that name renamed Ton Pentre), to enable a half-hourly service to be introduced by British Rail. Another new station was opened at Ynyswen on the same day.

In March 2007 it was announced that platforms on the branch are to be lengthened to enable 6 car trains to run, together with leasing of an additional eight Class 150s for the whole network. This has been completed.

The line between Treherbert and Porth was closed between 21st January and 24th January 2018 due to a landslip on the railway line. A replacement bus service ran whilst Network Rail cleared the line.[1]


The line currently has a half-hourly service Monday to Saturday daytime with services increasing to hourly in the evening. On Sunday the current service is two-hourly. On the 20th July, Arriva Trains Wales announced a summer trial of extra sunday services to Cardiff and Barry Island. This was in response to a recent survey by Leanne Wood and the success of extra sunday services on the nearby Merthyr Line and Rhymney Line.[2]

Electrification of the line[edit]

On 16 July 2012 plans to electrify the line were announced by the Government as part of a £9.4bn package of investment of the railways in England and Wales.[3]

The announcement was made as an extension of the electrification of the South Wales Main Line from Cardiff to Swansea and the electrification of the south Wales Valley Lines at a total cost of £350 million. The investment will require new trains and should result in reduced journeys times and a cheaper to maintain network. It is thought to start between 2014 and 2019.[4]

See also[edit]


Map all coordinates using: OpenStreetMap 
Download coordinates as: KML · GPX

Coordinates: 51°36′03″N 3°20′37″W / 51.6009°N 3.3437°W / 51.6009; -3.3437