Major Road Closures in Wales: M4 and A-Roads Disruptions (2026)

Get ready for some major road closures and disruptions across Wales! If you're planning a journey this week, it's crucial to prepare in advance. From the M4 to the A483 and A470, multiple roads will be closed for essential maintenance and roadworks. Here's a breakdown of what to expect and when, along with some tips to navigate these changes smoothly.

M4 Road Closures:
- January 29 - February 20: The M4 eastbound junction 25A Grove Park onslip road will be closed for roadworks. This closure impacts eastbound traffic, so plan an alternative route if you're heading in that direction.
- January 25 - April 1 (8 pm - 6 am): The M4 will be closed in both directions from junction 37 Pyle to junction 42 Earlswood for cyclic maintenance. One lane and slip roads will be affected, with local diversions in place. Traffic Wales predicts moderate disruption.
- January 29 - February 20: The inside lane of the M4 eastbound from junction 25A Grove Park to junction 25 Caerleon will be closed for roadworks, causing slight disruption.

A470 Road Closures:
- February 2 - February 20 (8 pm - 6 am): The A470 eastbound from Pontypridd to Abercynon will be closed overnight for roadworks. Plan your route accordingly if you're traveling in this area.
- February 13 - February 21 (7 pm - 6 am): The A470 will be closed in both directions from Caersws to Talerddig for carriageway maintenance. Diversions will be in place.

A483 Road Closures:
- February 1 - February 21: The A483 southbound Coedpoeth northbound onslip will be closed with diversions for roadworks. Be prepared for potential delays if you're using this route.
- February 2 - February 21 (7 pm - 6 am): The A483 southbound Plas Coch southbound onslip will be closed overnight for roadworks, potentially causing severe disruption. Traffic Wales has issued a warning.
- February 2 - February 21 (7 pm - 6 am): The A483 northbound Plas Coch southbound onslip will also be closed during the same period, leading to severe disruption. Plan an alternative route if possible.
- February 2 - February 21 (7 pm - 6 am): The A483 northbound Croesfoel onslip will be closed, and the A483 northbound Mold Road offslip will be closed from 7 pm until 6 am, likely causing severe traffic disruption. Traffic Wales has issued a severe disruption alert for these closures.

A487 Road Closures:
- February 2 - June 23 (9 am - 4 pm): The A487 will be closed in both directions in Aberystwyth Commins Coch for improvement work. Temporary traffic lights will be in place during this time.

Stay Informed:
For the latest updates on road closures and disruptions, sign up for the Wales Matters newsletter. It's your go-to source for the biggest issues facing the nation. Don't get caught off guard by these closures! But here's where it gets controversial... Are these road closures necessary, or could they have been planned better? Share your thoughts in the comments below. And this is the part most people miss... Remember, even small changes in your travel plans can make a big difference in avoiding delays. Stay tuned for more updates and tips to navigate Wales' busy roads.

Major Road Closures in Wales: M4 and A-Roads Disruptions (2026)

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