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Civil Engineering
Civil Engineering is a branch of engineering that deals with the design, construction, and maintenance of the built environment.
Civil Engineering is a branch of engineering that deals with the design, construction, and maintenance... View more
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Graham hits two milestones on £170M upgrade to M25 junction 28
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Graham hits two milestones on £170M upgrade to M25 junction 28
Contractor Graham has hit two “significant” milestones on the £170M project to upgrade junction 28 of the M25 motorway.
The M25 junction 28 connects the M25 with the A12, as well as providing local access to Brentwood in Essex and the A1023 Brook Street. At peak times up to 7,500 vehicles per hour pass through the junction. National Highways says it is “operating at capacity” and that traffic is expected to increase in the area by around 30% by 2037.
M25 junction 28 improvement programme overview
Working with National Highways, Graham has been able to successfully position, six 70m beams between the M25 and A12 for the new Grove Bridge. The beams create the foundation of the Grove Bridge Road deck, supporting a new loop road beneath Maylands Bridge and forming part of the new A12 eastbound off-slip, which is currently under construction.
This portion of work saw the contractor overcome challenges with overhead power cables to allow the team to utilise innovative modular transporters for safe and efficient installation.
The other milestone involved the installation of eight large pre-cast concrete sections for the new Weald Brook culvert. This work, which is essential for widening the M25 entry slip road, has been completed.
The operation was completed ahead of schedule, allowing for an early reopening of the M25, minimising disruption for road users.
Planned improvements as part of the junction 28 upgrade include a new two-lane loop road with hard shoulder for traffic travelling from the M25 anti-clockwise onto the A12 eastbound towards Brentwood. This merges into a single lane to provide a smooth transition between the loop road and A12.
The scheme will also upgrade the A12 eastbound to allow traffic from the loop road to join into a dedicated lane. In addition, the A12 eastbound exit slip road will be reconfigured for traffic using junction 28. The M25 anti-clockwise entry slip road will also be reconfigured for traffic leaving junction 28 to accommodate the new loop road.
Work to upgrade junction 28 of the M25 continues
Other works include widening the M25 anti-clockwise carriageway to provide additional space for traffic leaving to join the A12. Two new road bridges are part of the project, one carrying the A12 eastbound exit over the loop road, the other to take the loop road over the M25 anti-clockwise entry.
Graham was appointed as main contractor in a £124M contract signed in February 2021. The scheme was given the green light in May 2022 following planning delays and main construction work commenced in September 2022.
This summer saw Graham complete a brook diversion on the project. This is for wildlife safety.
It is expected to be open for traffic in summer 2025, with planting and landscaping continuing off network for a short time afterwards.
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