M25 motorway

National Highways says the 50mph limits are needed to test newly installed safety equipment.

The M25 and A3 will remain open, but the slip roads and roundabout at junction 10 will be closed.

Surrey Police are asking any witnesses to the crash on Wednesday morning to come forward.

The closures are part of a project to widen both carriageways, due to be finished by spring 2026.

Two slip roads between the A3 and M25 at Wisley will be closed over the weekend of 9 to 12 May.

Drivers are told the road could remain closed until 14:30 BST.

Police are appealing for witnesses after a man in his 60s died at the scene of a collision.

Some of the roadworks lifted are on the M25, the A27 in Sussex and the M2 in Kent.