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20mph speed limit

On 17th September 2023 most 30mph roads in Merthyr Tydfil changed to 20mph. This was a Welsh Government initiative which all local authorities in Wales had to implement.

This legislation changed the default speed limited on restricted roads. These are generally residential or busy pedestrian streets with streetlights.

But not all 30mph roads are restricted roads, and these remain at 30mph, and are signed.

To see which roads in Merthyr Tydfil have remained at 30mph please visit:

For more information on the 20mph legislation visit:

If you require any further information from the Council please contact us via email:

To view public information leaflets, including accessible formats and alternative language, please visit:


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