The interchange between the A13 and the M25 at junction 30 near Thurrock in Essex will be overhauled to reduce congestion and improve safety.
The A13 on approach to the junction will be widened to four lanes in each direction, and the junction itself will be improved, with new dedicated link roads between the M25 and the A13.
Highways Agency project manager Lizzie Pauling said:
This busy junction sits at the heart of the Thames Gateway regeneration area, and the improvements we’re making will make sure that it can continue its key role in supporting economic growth, both nationally and in the region. Traffic at the junction is expected to grow by up to a quarter by 2032, and safety at the junction is also a concern. The project will add vital extra capacity to the junction, and improve safety by almost a fifth.
Roadworks are set to begin on Friday 27 February, and expected to be complete in Autumn 2016. It will be completed in two main phases; first on the A13 and then, from January 2016 on the junction itself.
From Friday 27 February, narrow lanes will be installed on the A13. A 40mph speed limit will be introduced, which will remain in place until work is complete.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.