New average speed cameras which aims to catch out crafty drivers will be rolled out along the North Circular Road through Brent from tomorrow.

Speeding motorists who avoid capture by slowing down between fixed cameras along the A406 from Hangar Lane to Bounds Green Road will be targeted through the pilot scheme.

The cameras measures drivers’ average speeds not just the spots where they slow down to avoid being caught.

They have been successful in forcing drivers to stick to the speed limits on a section of the A40 between the Polish War Memorial and Paddington since they were installed last October.

Ben Plowden, director of surface strategy and planning at Transport for London (TfL), said: “We are strongly committed to reducing death and injury on London’s roads. That’s why we’re using the latest digital technology to tackle the address the number of incidents caused by drivers exceeding the speed limit.

“Average speed cameras mean that people comply with the speed limit on longer sections of road, rather than just where a camera is located.

“They can make a big difference in cutting the number of needless collisions, saving more lives.”

TfL will use roadside message signs to warn drivers about the new cameras.