I suspect the reason for the fall in accidents where the cameras have been switched off, is a simply one,
Drivers are actually watching the road and whats happening in front of them, instead of watching the speedo and thus not rear ending the car in front
We will never get rid of these damn revenue cameras sos' the naysayers will always believe they are the reason for less deaths, and that speed actually is a direct result of dying and not the fact they have no ability to drive,
If speed was the only factor we'd all be dead the second the speedo went over 30mph, i must be speaking from beyond in that case.... spooky