Drivers warned of closures this week on M4, A470, A40 and A48
Drivers warned of closures this week on M4, A470, A40 and A48
Several parts of the road network are set to be affected in the coming week as repair work takes place
There will be roadworks in various places on the M4 during the week ahead
(Image: Berkshire Live - Grahame Larter )
Drivers in south Wales are facing potential disruption this week as parts of the M4 will be shut due to planned roadworks.
Different sections of the motorway in both east and west Wales will be impacted, including the Prince of Wales Bridge, Baglan, Llandarcy and Llangyfelach. While the closures are only in place overnight, it's important to know which routes will be affected as many of the closures come into force at 8pm.
Elsewhere, there are also roadworks on parts of the A470, the A40 and the A48. Below is a list of all the closures you need to know about this week. For our free daily briefing on the biggest issues facing the nation, sign up to the Wales Matters newsletter here .
M4
Wenallt Road Overbridge - Road closed - Structural inspections - Diversions in place - 19/05/25-20/05/25 2000-0500
J22 Pilning/Prince of Wales Bridge to J23 Rogiet - Maintenance work - Bridge closed - Diversions in place - 19/05/25-22/05/25 2100-0600
J25A Grove Park to J28 Tredegar Park - Maintenance work - Tunnel closed - Diversions in place - 20/05/25-22/05/25 2000-0600
J41 Pentyla/Baglan - Electrical work - Entry slip road closed - Diversions in place - 19/05/25-20/05/25 2000-0600
J43 Llandarcy to J42 Earlswood - Electrical work - Entry slip road closed - Exit slip road closed - 1 lane closed - Diversions in place - 19/05/25-20/05/25 2000-0600
J46 Llangyfelach to J47 Penllergaer - Electrical work - Entry slip road closed - Exit slip road closed - 1 lane closed - Diversions in place - 20/05/25-21/05/25 2000-0600
A470
Southbound - Upper Boat to Nantgarw - Cyclic maintenance - Road closed - Diversions in place - 18/05/25-19/05/25 2000-0600
Northbound - Upper Boat to Pontypridd - Cyclic maintenance - Road closed - Diversions in place - 19/05/25-21/05/25 2000-0600
Southbound - Pontypridd to Upper Boat - Cyclic maintenance - Road closed - Diversions in place - 21/05/25-23/05/25 2000-0600
Abercynon Roundabout - Roadworks - Temporary traffic lights - 06/01/25-13/06/25 2000-0600 - Delays possible
Betws-y-Coed to Llanrwst - 28/04/25-30/06/25 0000 - Improvement work - Temporary traffic lights - Slow traffic
Article continues below
A40
Raglan to Abergavenny Hardwick R/bout - Resurfacing work - Road closed - Diversions in place - 15/05/25-20/05/25 2000-0600
Abergavenny Hardwick R/bout to Raglan - Resurfacing work - Road closed - Diversions in place - 20/05/25-21/05/25 2000-0600
Wolf's Castle to Letterston - Improvement work - 1 lane closed - STOP/GO in use - Delays possible - 17/03/25-04/06/25 0800-1700
A48
Briton Ferry to A483 Junction - Carriageway maintenance - Bridge closed - Diversions in place - 13/05/25-17/06/25 2000-0600
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