Officers from Surrey Roads Policng and Highways England have closed the M3 Southbound at Junction 1 where the A316 ends and the M3 begins.
Emergency services are dealing with a single vehicle collision with a car blocking multiple lanes.
A diversion route has been in place.
Drivers are being advised to follow signage with a black diamond sign on its side off at Sunbury Cross and along the A308 to Staines to join the M25 motorway.
Driver are reporting on the southbound, approximately 2 miles of slow moving traffic between Junction 1 – Junction 2.
More to follow