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⚠️ Cau ffyrdd oherwydd gwaith hanfodol – Y gyffordd ger Ffordd Ystrad / Ffordd Tyisaf, Pentref y Gelli - diweddaru

24 Aug 2023

Ystrad Road – Jct / Tyisaf Road Gelli

 Last weekend, our partners - Morrison Energy Services (on behalf of Wales & West Utilities) – began work in your area on a new gas diversion, required as part of our railway transformation works on the Treherbert Line, allowing us to double the track in this area.

Unfortunately, these works were not completed as we had hoped, due to several issues found by our site team; such as unknown utilities and services. As soon as we were aware of these issues we closed the site and removed traffic management, reopening the road.

Work will recommence this coming weekend – Saturday 26th and Sunday 27th August – again, within the junction area of Ystrad Road/Tyisaf Road. The work will involve indepth investigatory works to help us put together a plan for the gas main works.

To enable the work this weekend we will need to;

  • - have traffic management in place on Ystrad Road (A4058). This will involve a short section of the westbound carriageway at the junction of Tyisaf Road with traffic controlled by stop / go boards in the day time and traffic lights overnight
  • - close the junction at Tyisaf road and divert road users. There will be signage in place for this, which will divert traffic along Gelli Road and Church Road (B4223)

The image below shows our area of work. As the work will involve deep excavations, no vehicles will be able to cross over it. Therefore, emergency service vehicles will also be required to follow the diversions in place.

These works will also require amendments to public transport operations in the area during the days listed above. The 130 Stagecoach bus service will serve Gelli and Ton Pentre via Nantgwyddion Road whilst the 120 Stagecoach service will serve Llwynypia and Ystrad.

Footpaths will remain open during this time. For access between Tyisaf Road and Ystrad Road cyclists should either dismount and use the adjacent footpath or follow the diversion.

We thank you in advance for your patience and understanding and apologise for any inconvenience this may cause. Following investigations this weekend, we will work closely with engineers and planners to determine the course plan of action for future works, which will be programmed to minimise disruption as much as possible.  We will keep the community and road users updated of any upcoming works.

More information

Our team is available to answer your questions, so please call us via 033 33 211 202 (0800-2000 Monday to Friday, and 1100-2000 on Sunday). If you seek more information or would like the information presented in a different format, please visit

You can learn more about our vision for the South Wales Metro by visiting, and about our work to build the Metro at

Yours faithfully,

The Community Engagement Team at Transport for Wales