Here are the details of all road closures affecting the M4, A470 and other main in the coming week (beginning Saturday, February 10), with motorists being warned to avoid the area during closures. Several sections of the road are either fully or partially closed as a result of planned roadworks.

One of the biggest disruptions was expected on Saturday with part of the M4 is closed with rugby fans travelling to Twickenham for Wales' Six Nations clash with England but this was cancelled at the last minute. The road will now be closed from Sunday instead.

In an update, Traffic Wales said: "The scheduled works have now been cancelled. The road is now scheduled to be closed at 6am Sunday, February 11 and will reopen 6am, Monday, February 12. We apologise for any inconvenience."

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Traffic Wales and the Welsh Government had previously been warned of disruption to fans travelling for the rugby. The works were described as "safety-critical."

Here are all of the other planned closures for this week across Wales' main roads:

  • The M4 eastbound at Junction 26 shut due to essential expansion joint repairs. The M4 will be closed at 6am Sunday to 6am on Monday.

  • M4 at Pyle - One lane closed due to roadworks on M4 Eastbound from J37 A4229 (Pyle / Porthcawl) to J36 A4061. In place until 10pm on March 18.

  • A470 - One lane closed due to tree cutting on A470 in both directions between M4 J32 (Coryton Interchange) and A4102 (Rhydycar Roundabout). Between 9:30am and 15:30pm Mondays to Sundays until March 20.

  • A479 Brecon - Closed in both directions due to water main work from Hereford Turn Off (Llyswen) to Brecon Turn Off (Bronllys). Until March 3.

  • A4102 Merthyr Tydfil - Swansea Road closed in both directions due to roadworks from A465 Heads Of The Valleys Road to Castle Park. Until August 10.

  • A4054 Merthyr Tydfil - Upper High Street in both directions closed due to long-term roadworks between Cil-Sanws Lane and Grawen Lane. Until December 31, 2025.