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Home Projects South Wales Metro electrification update

South Wales Metro electrification update

Transport for Wales has successfully completed the first phase of electrification on the South Wales Metro and progressed with station transformation and signalling work.  

The railway line between Cardiff and Pontypridd will open today (5 June).   

However, transformational engineering works on the Aberdare and Merthyr lines will continue until 12 June. 


Transport for Wales is urging all customers to check before they travel and allow enough time for their journeys, as there could be timetable changes and bus replacement services will continue to run to keep people moving.  

Customers are also being advised ahead of the Coldplay concert in Cardiff on 6 and 7 June, that there will be no trains north of Pontypridd (Treherbert and Merthyr Tydfil Lines) and Mountain Ash (Aberdare Line).  Rail replacement buses will be busy, and customers should plan ahead.  

Replacement buses will be in operation, with changes for rail services at Pontypridd / Mountain Ash. Ticket acceptance has also been agreed with Stagecoach for the below services:  

  • T4 Merthyr – Cardiff  
  • 60/61 – Aberdare to Pontypridd  
  • 120-130 – Treherbert – Pontypridd  
  • 132 – Pontypridd – Porth  

For the most up to date information, please use our Journey Checker or visit our website   

Also, from 5 June, there will be changes on the Treherbert bus replacement service timetable and customers are again urged to plan ahead and check before they travel.  

Marie Daly, Chief Customer and Culture Officer at Transport for Wales said:  

“We’ve taken a huge step forward in delivering the South Wales Metro and electrified the first part of the railway line in the valleys.  In the near future, this will allow us to run faster, cleaner and more efficient services. 

“We will also reopen the line between Cardiff and Pontypridd on 5 June. 

“Unfortunately, some of our planned engineering work is over-running while we complete all the necessary checks to allow the infrastructure to be reopened safely. 

“We understand the extension of rail replacement buses that are currently in place will be frustrating for passengers, especially with a major event taking place in Cardiff next week. 

“It is important customers familiarise themselves with the rail replacement timetables to get to the event and home safely afterwards. We also have ticket acceptance in place with bus operators and customers are advised to make use of these where possible.” 

“All our teams are working hard to ensure that we offer the best possible service to our customers.”   

For the most up to date information, please use our Journey Checker or visit our website

Photo and video credit: Transport for Wales

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