National Highways is closing the Surrey stretch of the M25 for two weekends in March as part of the ongoing junction 10 improvement project.
The weekend closures, which will see old bridges demolished and removed, are due to take place from junction 10 (Wisley) to 11 (Woking) and will run from Friday 7 March to Monday 10 March and Friday 21 March to Monday 24 March. The closures will start from 9pm on the Friday evening and remain in place until 6am on the Monday morning.
Diversion routes for each of these closures will be announced and published closer to each weekend.
As with the previous three weekend closures last year, drivers are again warned to expect delays and only travel if necessary.
National Highways has also urged drivers to follow its travel advice instead of sat-nav diversions, which it says will be key to reducing congestion.
Other significant works in the coming weeks and months will see the slip roads from junction 10 closed between 21-24 February. Meanwhile, the A3 will be closed in both directions between Junction 10 and Cobham Roundabout/A245 between 11-14 April.
These are the latest closures as work to ease congestion and improve safety at the busiest junction of the M25 continues.
Jonathan Wade, National Highways senior project manager, said: “We were grateful to drivers who listened to our advice during the three weekend closures last year and I’d again urge them to only use the motorway if their journey is absolutely necessary.
“Unfortunately, it’s simply not possible to carry out this scale of infrastructure improvement, which will benefit millions of people in the long term, without there being some degree of short-term disruption.
“We have spent months planning these closures, but they will still cause significant congestion and delays, so we are asking road users to allow extra time and use alternative routes where possible. Please follow our official diversion routes and not information from sat-navs.”
National Highways has also announced that the final completion date for the project has now been moved back to spring 2026, although the fundamental elements of the scheme which affect drivers day-to-day are still expected to be finished this summer.
National Highways added: “This does not mean continued heavy congestion and, in practical terms, most road users will not be affected by the project’s extended completion date.”
Wade continued: “Periods of extreme weather in 2024 delayed some elements of our work but since then we’ve worked hard to recoup that time and still complete the on-road elements on schedule.
“We are already seeing some of the benefits of this project, which will help reduce congestion, create a smoother flow of traffic and provide safer journeys for thousands every day.”
The junction 10 improvement scheme will increase the number of lanes to make journeys safer and improve traffic flow.
It will also make it easier and safer to enter and exit the M25, provide safer entry roads for Wisley, Pyrford, Old Byfleet and the RHS Garden Wisley, and will reduce the pollution caused by traffic jams.
More details of the project and motorway closures are here.
