Think you may be right about that, Peter. Those of you who use the A34 will know there were bridge repair works at Didcot last year. The average speed cameras were set at 50, then reduced for a half mile stretch to 40. I got a ticket in my Plus8 at 45 average (having reduced from 50 to 40 a bit late!) and when i checked, i was told that at 44 i would not have registered. On a relative basis, that equates to just over 56 in the 50 zone. And i did enjoy the speed awareness course!
That's interesting, the usual view is that speed cameras are set to trigger at +10% +2 mph, so 35 in a 30 limit, 46 in a 40, 57 in a 50 and so on.
It's worth knowing that average speed zones are set lower than this - and reassuring to know they aren't set at bang on the limit!
