M25 junction 10/A3 Wisley interchange improvement scheme

Closed 6 Feb 2017

Opened 5 Dec 2016


View the consultation brochure.

Take part in the consultation.

We want your views on our plans to improve the M25 junction 10/A3 Wisley interchange to tackle issues including congestion, capacity, safety, noise and environmental impacts.

The 2 options which this consultation is seeking views on are:

  • Option 9 – a new fl yover to link right-turning movements from the A3 onto the M25
  • Option 14 – enlarging the existing roundabout, to add more capacity

We are also looking at the A3 between Ockham and Painshill. Improvements could include widening parts of the A3 to 4 lanes, creating an extra lane for vehicles turning left onto the A245 at the Painshill roundabout, and changing local accesses to make these safer and cause fewer delays on the A3.

Why We Are Consulting

This section of the M25 is of nationally-strategic importance, as it is vital for access to and from Heathrow and is a key route from the Kent ports to much of the rest of the country. The cost to the economy of ongoing delays here would be considerable if left unchanged.

The A3, which is the key route between London and Portsmouth, intersects the M25 at junction 10, and has its own issues with traffic flow. Painshill interchange, to the north of the junction, creates a pinch-point or bottleneck, because its current layout and proximity to junction 10 restricts traffic flow through the area.

The M25 junction 10/A3 Wisley interchange has been identifi ed for improvements as it experiences heavy congestion on a daily basis. This causes queues and prevents access from Ockham Park junction (A3) to the M25 junction 10 and on to Painshill junction (A3) in both directions. A similar problem is experienced by traffic entering and exiting the M25 junction 10/A3 Wisley interchange. The area around the M25 junction 10/A3 Wisley interchange has the highest recorded collision rate across the Highways England network.

This consultation aims to get your views on 2 potential options for improvements. A number of other options have also been looked at but they either fail to reduce congestion or improve safety, or have a very signifi cant impact on the surrounding environment.

Details on the 2 options, with maps, are contained in the scheme brochure.

Once we have analysed your feedback, a preferred route will be chosen and more detailed plans will be developed. You will have a further opportunity to give feedback via public consultation once the preferred route is announced – this is expected to be in late 2017.


  • All members of the public


  • Roads