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Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.
Rydym yn croesawu galwadau’n Gymraeg. We welcome calls in Welsh.

A40 Eastbound Dual Carriageway South of Brynich, Brecon

Start date:10/03/2026 | End date:14/03/2026

A40 Brynich

Essential carriageway resurfacing to a section of the A40 eastbound carriageway between Brynich Roundabout.

Work to carry out essential carriageway resurfacing to a section of the A40 eastbound carriageway between Brynich Roundabout and the B4558 interchange east of Brecon will commence on the 10/03/2026 for 4 nights

The work will be carried out over the 4 nights 19:00 – 07:00 under a full eastbound carriageway closure (between Brynich Roundabout and the B4558 interchange). The signed alternative route will be via the A470 and A438 northeast to Bronllys, and then the A479 south to rejoin the A40. 

The works are being carried out overnight when traffic flows are historically lower to minimise disruption.

For further information, please contact Traffic Wales on 0300 123 1213 or via X and Facebook.