Construction firm GRAHAM has started improvement work on the M25 junction 28 for National Highways.

Junction 28 plays a major role in connecting the A12 and the M25, as well as providing access to Brentwood via the A1023.

Up to 7,500 vehicles currently travel through the junction roundabout every hour at peak times, which is already operating at capacity, with motorists regularly experiencing congestion and delays.

The work involves the creation of a two-lane loop road with a hard shoulder for traffic travelling from the M25 northbound carriageway anti-clockwise onto the A12 eastbound carriageway towards Essex.


This will include the construction of new bridges to take the loop road over or under the other road links and the Weald Brook, along with new signage and changes to the landscape.

GRAHAM will also change the position of the A12's eastbound exit slip road and the M25’s anti-clockwise entry slip road to allow for the new loop road.

In addition, work will involve widening the M25 anti-clockwise carriageway to provide more space for traffic leaving the A12 heading eastbound.

The majority of the construction work will take place off the road network, with the new loop road and links being almost fully completed before any work takes place that will impact drivers.

Work on the scheme is expected to take 36 months, with an anticipated completion date of summer 2025.