Several roads in Wales are shut or partially blocked on Sunday, June 15 – here is a full list of closures you need to know about

08:15, 15 Jun 2025Updated 08:21, 15 Jun 2025

Queuing traffic on M4 motorwayRoadworks are having an impact on several roads in Wales on Sunday, June 15(Image: John Myers)

Several major roads across Wales are shut or partly shut on Sunday, June 15, due to planned roadworks. As of time of publication of this article on Sunday morning there were no major issues or new incidents affecting the M4 in south Wales, but there are some works taking place on both the A470 and A48.

And there is also one lane of the M4 Prince of Wales Bridge closed due to resurfacing work, while there are roadworks on the A40 in Monmouth in both directions.

Other A-roads across parts of Wales are affected, so it’s worth keeping an eye on any alternative routes that might make your journey easier and quicker on Saturday. For our free daily briefing on the biggest issues facing the nation, sign up to the Wales Matters newsletter here.

Below is a list of road closures and part closures/disruptions affecting roads in Wales on Saturday (according to traffic monitoring service Inrix):

  • M4 PRINCE OF WALES BRIDGE – MONMOUTHSHIRE – WESTBOUND – BRISTOL – One lane closed due to resurfacing work on M4 Prince of Wales Bridge Westbound between J22 M49 and M4 J23 / M48. There will be some overnight closures. Until July 7.
  • M48 SEVERN BRIDGE – GLOUCESTERSHIRE – BOTH DIRECTIONS – MONMOUTHSHIRE – Temporary gross weight limit of 7.5 tonnes due to bridge maintenance work on M48 Severn Bridge in both directions between J2 A466 Wye Valley Link Road (Chepstow) and J1 A403 (Aust). For lorries only. Buses and coaches can use the bridge as normal. Until May 27 2026.
  • A534 HOLT ROAD – BORRAS – EASTBOUND – WREXHAM – A534 Holt Road Eastbound closed due to roadworks from Rydal Court to B5100 Dean Road. Until May 26 2026.
  • A5 MENAI BRIDGE – MENAI BRIDGE – GWYNEDD – Temporary traffic lights due to long-term roadworks on A5 Menai Bridge between A487 Treborth Road (Antelope Roundabout) and A545 Telford Road. Expect delays. Until December 31
  • A470 LLANRWST ROAD – DOLGARROG – CONWY – Temporary traffic lights due to water main work on A470 Llanrwst Road near the train station. Expect delays. Until June 20.
  • A48 SWANSEA ROAD – PONTLLIW – SWANSEA – Temporary traffic lights due to electricity work on A48 Swansea Road at Oaklands Road. Expect delays. Until June 16.
  • A470 – LLANGURIG – POWYS – Convoy system and roadworks on A470 around the A44. Expect delays. Until June 17.
  • A40 – MONMOUTH – BOTH DIRECTIONS – MONMOUTHSHIRE – Contraflow and roadworks on A40 in both directions between A466 Dixton Road (Dixton Roundabout, Monmouth) and B4164 / Norton Close (Whitchurch). Expect delays. Until August 22.
  • A484 – GLANGWILI – CARMARTHENSHIRE – Temporary traffic lights due to roadworks on A484 between Pantglas (Glangwili) and B4301 (Bronwydd Arms). Expect delays. Until June 30.
  • B4312 OLD ST CLEARS ROAD – JOHNSTOWN – WESTBOUND – CARMARTHENSHIRE – Old St Clears Road Westbound closed due to roadworks from Job’s Well Road to Millbank Road. Until March 4 2026.
  • B5429 – BODFARI – BOTH DIRECTIONS – DENBIGHSHIRE – B5429 in both directions closed due to roadworks from Ffynnon Y Chwarel (Bodfari) to Heol-Y-Brenin (Tremeirchion). Until October 23 2025.
  • B5605 PARK ROAD – PENTRE – WREXHAM – Park Road closed due to roadworks from A5 to The Newbridge Arms. Until July 24 2025.
  • THE A488 – HOPE – BOTH DIRECTIONS – SHROPSHIRE – Temporary traffic lights due to emergency repairs and roadworks on The A488 in both directions near Hope. Until September 1.
  • THE A487 – TRE-R-DDOL – CEREDIGION – Temporary traffic lights due to roadworks on The A487 between Tre’r ddol (Tre-R-Ddol) and Furnace (Furnace). Expect delays. Until March 31 2026.
  • THE A4093 – BRYN GOLAU – BOTH DIRECTIONS – RHONDDA, CYNON, TAFF – Temporary traffic lights due to water main work on The A4093 in both directions at The B4278/Mountain View. Until November 30 2025
  • A487 – LLWYNCELYN – CEREDIGION – Temporary traffic lights due to roadworks on A487 near Bargoed Farm. Expect delays. Until June 20.
  • M4 Eastbound entry slip road closed due to roadworks at J25A A4042 (Newport / Cwmbran).