M4 Junction 12
Published: 02 January 2025
Phase one of essential bridge repairs at junction 12 of the M4 has been completed, and phase two is due to start on Monday 6 January 2025, and parts of the roundabout/slip road will be closed.
The east side of the junction will be reduced to two lanes from 6 January until mid-March. There will also be overnight closures from 9.00pm to 6.00am on the east side of the junction, including on the slip road to the M4 eastbound, from 6 January until early February.
Further details may be found in the Traffic Order Document and on the One Network website