M4 junction 40 Eastbound exit slip road will be closed from 1st March and Monday 17th March
Details of Restrictions | Start Date and Time** | End Date and Time** | |
Full M4 closure eastbound (to install Varioguard)
Slip road closed
Full M4 closure eastbound (to remove Varioguard)
| 20:00 01/03/2026 20:00 01/03/2026 20:00 16/03/2026 | 06:00 02/03/2026 06:00 17/03/2026 06:00 17/03/2026 |
A diversion route will be in placed using M4 eastbound to junction 38 and the A48 (Margam Road) westbound and M4 J39 to 40 westbound – this diversion will be relevant for the 15 nights