Speed cameras installed on M25 at Wisley
Speed cameras have been installed on a Surrey section of the M25 motorway where improvement work is taking place.
Surrey County Council said the cameras were in operation on a 2.7-mile (4.3km) stretch of the motorway close to junction 10 at Wisley.
The Highways Agency plans to introduce a controlled motorway scheme on that stretch of the M25 by May 2011.
The scheme will see mandatory speed limits introduced to regulate traffic during busy times.
A spokesman for the county council said: "The cameras have been put in place to ensure motorists drive at safe speeds, protecting both other road users and contractors working on the extension.
"This will be particularly important during off-peak hours and at night when traffic moves more freely."
The Highways Agency said the controlled motorway scheme would reduce congestion and improve safety for motorists.