Creating safer journeys while reconnecting people, places and wildlife
Transforming a vital connection
Every day, more than 300,000 vehicles pass through M25 Junction 10, making it the busiest junction on the motorway network.
But increasing traffic volumes had led to congestion, delays and safety concernson this vital route through the South East.
Improving the junction offered an opportunity to create safer, more reliable journeys – reconnecting communities, restoring habitats and leaving a lasting legacy for the surrounding area.
Working on behalf of National Highways and in partnership with AtkinsRéalis, we delivered major improvements to the M25 Junction 10/A3 Wisley interchange, helping improve traffic flow while creating wider benefits for people and the environment.
Opening up the landscape
The scheme has made it easier for people to travel through the area without a car.
New routes for pedestrians, cyclists and horse riders provide safer connections through the interchange while improving access to the surrounding countryside.
A new 5km accessible route now links destinations around Wisley and Ockham Commons, supported by crossings and bridges that reconnect places once divided by major roads.
Reconnecting nature
The interchange sits within one of Surrey’s most environmentally sensitive landscapes., the scheme balanced infrastructure improvements with environmental stewardship.
daily journeys supported
hectares of heathland restored
heathland green bridge in the UK
Some of the most extensive environmental works ever undertaken by National Highways formed part of the project, including the restoration of more than 25 hectares of heathland.
At the heart of the works is the UK's first heathland green bridge.
Crossing the A3, the bridge reconnects rare lowland heathland and provides a safe route for wildlife, helping species move more freely across a landscape previously divided by the road for decades.
Designed for the long-term
New walking, cycling and equestrian routes have opened connections around Wisley and Ockham Commons, while restored heathland and the green bridge will continue to support wildlife long after construction has ended.
Together, the improvements show how one of the country's busiest road junctions can work better for the people who travel through it and the landscape that surrounds it.
What changed
- Capacity increased and congestion reduced at the busiest junction on the M25
- UK's first heathland green bridge
- Restoration of more than 25 hectares of heathland
- Four new slip roads at Junction 10
- A3 widened to four lanes through the interchange
- Eight new or replacement bridges
- 5km of routes for pedestrians, cyclists and horse riders
- Over £93 million spent with local businesses
- 25 apprentices and graduates recruited through the scheme