Start date: 28/09/2025| End date: 25/01/2026
Essential works to address hazardous trees adjacent to the M4 between J33 (Cardiff West Interchange) and the Prince of Wales Bridge will commence on 28/09/2025 for 4 months.
The work will be undertaken during the night between 20:00 and 06:00 utilising mostly hard shoulder and lane closures; however, some total slip road closures will be required to provide the necessary safety zones. Signed diversions will be put in place during total closures.
No works will be undertaken during the Christmas embargo period between 19/12/2025 and 05/01/2026.
Closures as follows -
September:
J32 WB On-Slip (28/09/2025 – 29/09/2025)
October:
J33 WB Off-Slip & J33 Gyratory (Inner Ring) (01/10/2025 – 02/10/2025)
J33 EB On-Slip (05/10/2025 – 06/10/2025)
J27 EB Off-Slip (14/10/2025 – 15/10/2025)
J27 EB On-Slip (15/10/2025 – 16/10/2025)
J26/J25a EB On-Slip (23/10/2025 – 10/11/2025)
**Please note, programme may be subject to change.
Signed diversions will be put in place during total closures.