M25 traffic warning over ‘full closure’ for 3 nights with map of diversion route

By Staff

A section of the M25 will be fully closed for three nights later this month for the first time ever, National Highways has warned. The busy motorway will be closed between Junctions 10 (for the A3) and 11 (for Chetsey) in Surrey over the course of a weekend later in March, with long delays expected as a result.

Drivers have been urged only to travel if necessary while the M25 is closed. This will be between 9pm on Friday, March 15 and 6am on Monday, March 18.

It’s likely to affect concertgoers and sports fans travelling into and out of London from the south of England so it’s advised to allow extra time for journeys or to find alternative travel arrangements.

READ MORE: Full list of Elizabeth line closures this month as trains won’t stop at some stations

The M25 is being closed completely for a full weekend for the first time ever as part of a major project aiming to improve pollution and improve safety. During this closure, the Clearmount bridleway bridge between Wisley and the Chertsey Interchange is being demolished and a large gantry being installed.

This is part of the Junction 10 improvement scheme, which will see an increase in the number of lanes – designed to make journeys safer and to improve traffic flow. National Highways also says the improvements will make it easier and safer to enter and exit the M25.

The development will provide safer entry roads for Wisley, Pyrford, Old Byfleet and RHS Wisley. It will also reduce the pollution caused by traffic jams, National Highways say.

But a full closure is needed to safely demolish the overbridges and install the new gantry, National Highways has claimed. Jonathan Wade, National Highways Project Lead, said: “Drivers should only use the M25 if their journey is absolutely necessary. This is the first of five full closures of one of the busiest junctions on our road network.

“We have spent months planning for these closures and making sure there are diversion routes in place, but there will still be heavy congestion and delays.”

Diversion route in place

A diversion route will be in place while the M25 is closed. This is the same in both directions.

  • Junction 10 – Junction 11: North bound A3 to Painshill Junction, A245 towards Woking, and then A320 to M25 Junction 11.
  • Junction 11 – Junction 10: A320 south towards Woking, A245 towards Byfleet and Painshill junction, Southbound A3 to Junction 10.
  • Taking the M25 in the other direction to avoid the closure is also an option.

This will be the first of five closures between now and September 2024. The next full closure of the M25 is due to take place in April to allow for the installation of the new Clearmount bridleway bridge.

As well as this, later in the year National Highways is planning to install the new Cockcrow Green Bridge, the centrepiece of the project. This will be the UK’s first ever heathland bridge, and will connect Ockham and Wisley commons for the first time.

For further information, click here to visit the National Highways website.

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