Wales Road Closures: M4, A470, A483, and A487 Disruptions Ahead (2026)

Get ready for some major road closures across Wales this week! If you're planning a journey, it's best to prepare in advance as you could be facing some disruptions. From the M4 to the A483, here's a breakdown of the closures and what you need to know. But here's where it gets controversial... Some of these closures could cause severe disruptions, so it's important to be aware and plan accordingly. Let's dive in and explore the details.

M4 Road Closures

The M4 is set to be a busy road this week, but not in the way you might expect. Here's what you need to know:

  • M4 Eastbound Junction 25A Grove Park Onslip Road: This road will be closed from January 29 until February 20 due to roadworks. That means a potential change in your usual route if you're heading eastbound.
  • M4 in Both Directions (Junction 37 Pyle to Junction 42 Earlswood): Get ready for some lane closures and roadworks from January 25 until April 1, happening between 8 pm and 6 am. Traffic Wales predicts moderate disruption, but it's still something to keep in mind.
  • M4 Eastbound (Junction 25A Grove Park to Junction 25 Caerleon): An inside lane closure is expected this week, with roadworks taking place from January 29 until February 20. Slight disruptions are likely, but it's best to be prepared.

A470 Road Closures

The A470 is also set to undergo some changes this week:

  • A470 Eastbound (Pontypridd to Abercynon): This road will be closed overnight from February 2 until February 20 for roadworks. Plan your route accordingly if you're heading this way after dark.
  • A470 in Both Directions (Caersws to Talerddig): Carridgeway maintenance will require the road to be closed between 7 pm and 6 am from February 13 until February 21. Diversions will be in place, but it's still a potential disruption.

A483 Road Closures

The A483 is set to be a busy road with multiple closures this week:

  • A483 Southbound Coedpoeth Northbound Onslip: Closed for roadworks from February 1 until February 21, with diversions in place. Be prepared for potential delays if you're heading this way.
  • A483 Southbound Plas Coch Southbound Onslip: Closed overnight from 7 pm to 6 am from February 2 until February 21 for roadworks. Traffic Wales warns of severe disruption, so plan your route carefully.
  • A483 Northbound Plas Coch Southbound Onslip: Closed from 7 pm to 6 am from February 2 until February 21, causing severe disruptions. Be aware of potential delays if you're heading northbound.
  • A483 Northbound Croesfoel Onslip: Closed from 7 pm to 6 am from February 2 until February 21 for roadworks, which could bring severe disruptions. Plan your route carefully if you're heading this way.
  • A483 Northbound Mold Road Offslip: Closed from 7 pm to 6 am from February 2 until February 21 for roadworks, likely causing severe traffic disruption.

A487 Road Closures

The A487 is set to undergo some improvements, which will require road closures:

  • A487 in Both Directions (Aberystwyth Commins Coch): Closed for improvement work, with temporary traffic lights in place from 9 am to 4 pm from February 2 until June 23. Be aware of potential delays if you're heading this way during those times.

So, there you have it! With these road closures in mind, it's best to plan your journeys carefully and be prepared for potential disruptions. And this is the part most people miss... Don't forget to sign up for the Wales Matters newsletter for daily briefings on the biggest issues facing the nation. Stay informed, and happy travels!

Wales Road Closures: M4, A470, A483, and A487 Disruptions Ahead (2026)

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