Closures of M25 and A3 closures as junction 10 project enters next phase
National Highways is warning road users who use the M25 and A3 in and around Surrey about weekend closures that will take place throughout the year.
Junction 10 on the M25 – the interchange with the A3 at Wisley – is one of the busiest in the country and experiences large queues and heavy congestion on a daily basis. It also has one of the highest recorded collision rates across England’s motorway and major A roads nationally. This project will reduce collisions by around a third but also create a better connection and smoother traffic for the 270,000 drivers who use it every day.
For the safety of road users and the operatives undertaking the work, a number of weekend closures of the M25 and A3 in Surrey will be needed throughout the year to enable the works to be completed safely and efficiently. The first closures will take place in February and March:
✅ A3 between Send and junction 10 (Wisley): Full carriageway closure, both directions – from 9pm on Friday 23, to 6am on Monday ,26 February. Bridge demolition work.
✅ M25 between junction 11 (Chertsey Interchange) and junction 10 (Wisley): Full carriageway closure, both directions – from 9pm on Friday, 15 March, to 6am on Monday, 18 March. Bridge demolition and gantry installation.
Further closures of the M25 and A3 are planned throughout the year. National Highways will be sharing the detailed information on the scheme website to keep road users informed. Due to the nature of the works, all closures are subject to change if events outside of National Highways control occur – such as adverse weather conditions. National Highways M25 junction 10 upgrade is expected to be complete in summer 2025.
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