M4 Junctions 48 to 49 Yr Hendy, Llannon Bridge Joint Renewal Works

To enable the works to be carried out safely, overnight full closures of the M4 between Junctions 48 and 49 will be required between 20:00 and 06:00. 

The closures are scheduled as follows:

• Westbound closure (J48 to J49): 15^th November 2026 and 22^nd – 26^th November 2026, between 20:00 and 06:00. And safety lane 2 closures on 17^th - 18^th November 2026.
• Eastbound closure (J49 to J48): 16^th – 22^nd November 2026, between 20:00 and 06:00. 

The works are being undertaken overnight when traffic flows are lower to minimise disruption to road users.

Westbound (J48 to J49):
Traffic will be diverted off the M4 at Junction 48 to follow the A4138 eastbound, then continue onto the A48 eastbound before rejoining the M4 at Junction 49.

Eastbound (J49 to J48):
Traffic will be diverted off the M4 at Junction 49 (Pont Abraham Interchange) to follow the A48 westbound, then continue onto the A4138 southbound before rejoining the M4 at Junction 48.

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