I believe most of the average speed cameras in roadwork sections are operational. I heard of one fine on th M1 and the driver said it was a very good photo! Jeremy Clarkson came in for criticism (nothing new there then!) for saying that the cameras couldn't cope with vehicles changing lane - recorded in say lane 1 and then before next camera changing to lane 2. I've decided that those motorists who excedd the average speed either have false plates, stolen cars, believe the cameras don't work or are under the misaprehension that they operate like gatso cameras.