Several roads in Wales are shut or partially blocked on Saturday, May 17 – here is a full list of closures you need to know about
Several major roads across Wales are shut or partly shut on Saturday, May 17, due to planned roadworks. As of time of publication of this article on Saturday morning there were no major issues or new incidents affecting the M4 in south Wales or the A470 or A48.
However, there are a number of planned roadworks taking place that motorists need to be aware of if they’re heading out and about on Saturday. One lane of the M4 Prince of Wales Bridge is closed due to resurfacing work, while the A55 near the border in Cheshire will be closed overnight 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 – BOTH DIRECTIONS – BRISTOL – One lane closed due to resurfacing work and contraflow on M4 Prince of Wales Bridge in both directions between J22 M49 and M4 J23 / M48. One lane shut on each side with Wales-bound traffic running through a contraflow. There will be some overnight closures. Until 30th May.
- A55 – CHESHIRE – BOTH DIRECTIONS – Advance Warning – A55 in both directions closed due to roadworks during the night from J40 A51 Tarvin Road (Vicars Cross Interchange) to J38 A483 Wrexham Road (Posthouse Roundabout). From 21:00 on the 17th to 4:00 on 18th May.
- A534 HOLT ROAD – BORRAS – EASTBOUND – WREXHAM – A534 Holt Road Eastbound closed due to roadworks from Rydal Court to B5100 Dean Road. Until 6th May 2026.
- A465 HEADS OF THE VALLEYS ROAD – MERTHYR TYDFIL – Lane closed due to long-term roadworks on A465 Heads Of The Valleys Road at High Street (Dowlais Top Roundabout). Expect delays. Until 8:08 on 24th July.
- A465 HEADS OF THE VALLEYS ROAD – RHONDDA CYNON TAFF – BOTH DIRECTIONS – RHONDDA, CYNON, TAFF – Narrow lanes and speed restriction of 40 mph due to long-term roadworks on A465 Heads Of The Valleys Road in both directions from A4061 Rhigos Road (Rhigos Roundabout) to High Street (Dowlais Top Roundabout). Expect delays.
- A525 – GREEN – DENBIGHSHIRE – Temporary traffic lights due to electricity work on A525 between A543 Rhyl Road and Capel y Green church. Until 3rd June.
- A484 – GLANGWILI – CARMARTHENSHIRE – Temporary traffic lights due to roadworks on A484 between Pantglas (Glangwili) and B4301 (Bronwydd Arms). Expect delays. Until 30th June.
- 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 4th March 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 23rd October 2025.
- B5605 PARK ROAD – PENTRE – WREXHAM – Park Road closed due to roadworks from A5 to The Newbridge Arms. Until 24th July 2025.
- 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 31st March 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 30th November 2025.