28/09/2026
⚠️ A12 NORTHBOUND OVERNIGHT CLOSURE
National Highways will soon start the final phase of resurfacing work on sections of Old London Road, including refreshing the road markings.
📅 Friday 9 October 2026
⏰ 9pm to 5am
To carry out the work safely, the A12 northbound will be closed between junctions 19 and 25.
This section needs to be closed because Old London Road can be accessed from the A12 at several points. The full closure will prevent vehicles from entering the work area and help keep road users and the workforce safe.
A12 northbound diversion:
• Leave the A12 at junction 19
• Join the A131
• Continue to the A120
• Follow the A120 and rejoin the A12 at junction 25
• Follow the A131 and rejoin the A12 at junction 19
Clearly signed diversion routes will be in place throughout the closure.
The work is subject to weather conditions and plans may need to change.
For the latest information, visit:
https://nationalhighways.co.uk/roads-and-travel/road-projects/east/a12-chelmsford-to-colchester-maintenance/
For information about other road improvements across the East of England:
https://nationalhighways.co.uk/roads-and-travel/road-projects/east/
National Highways can also be contacted on 0300 123 5000 or at [email protected].