02/11/2026
Please see the planned closure information below which will affect the Marks Tey to Boreham Southbound section of the A12 overnight from the 4th - 6th November.
From National Highways
Important roadworks information
A12 southbound between Marks Tey and Hatfield Peverel– urgent resurfacing
We’re planning to carry out essential resurfacing work on the A12 southbound between Marks Tey and Hatfield Peverel. Once complete, drivers will benefit from a safer, smoother and better-defined road surface.
We plan to complete this work over three nights starting Wednesday 4 November 2026. We will work overnight between 9pm and 5am on weeknights only, weather permitting.
Closures and diversions
To carry out the work safely, we will need to close the A12 southbound and divert traffic as follows:
• Exit the A12 southbound at junction 25 for Mark’s Tey Interchange
• At Princess of Wales Roundabout, take the third exit onto the A120 westbound
• At the following roundabout, take the first exit onto A120 Coggeshall Road and continue on the A120 towards Braintree
• At Marks Farm Roundabout, take the first exit, continuing to follow the A120 westbound
• Exit the A120 at Great Notley Roundabout for the A131
• At the roundabout, take the second exit onto the A131 and continue towards Chelmsford
• At Generals Lane Roundabout take the fourth exit for A12 northbound junction 19 and follow towards junction 25, resuming your journey.
Please note emergency vehicles will have access through the works with caution.
A map of the diversion can be found below.
