Start date: 27/10/2025| End date: 08/01/2026
Work to carry out essential refurbishment of expansion joints and resurfacing to the Pentrebach Viaduct between A470 Abercanaid roundabout and A4060 Pentrebach roundabout will commence on 27/10/2025 for 10 weeks.
The work will be carried out over 9 weeks between the hours of 20:00 – 06:00 under a full carriageway closure between the A470 Abercanaid roundabout and the A4060 Pentrebach roundabout.
The works are being carried out overnight when traffic flows are historically lower to minimise disruption.
A470 northbound and southbound - traffic accessing the A4060 via Abercanaid roundabout will be diverted north to the Cefn Coed interchange roundabout, then east to re-join the southbound A4060 via the A465 Dowlais Top interchange roundabout.
A465 to A470 via A4060 - will be diverted west to Cefn Coed interchange roundabout to rejoin southbound A470.
A4060 southbound from Pentrebach roundabout - will be diverted north to Dowlais Top interchange roundabout, then west along the A465 to re-join the A470 at Cefn Coed interchange roundabout.