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20mph speed limit

From 17th September 2023 most 30mph roads in Merthyr Tydfil will change to 20mph. This is a Welsh Government initiative which all local authorities in Wales must implement.

This legislation changes 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 will be signed.

To see which roads in Merthyr Tydfil will remain 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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