On 12/05/2013 02:27, Arfa Daily wrote:


"John Rumm" wrote in message
o.uk...
On 10/05/2013 01:40, Arfa Daily wrote:

Based on the fact that the ones on the other side of the road now seemed
to be working, she reasoned that the ones her side now probably were as
well. She knew that she had been going over the limit - although she
says not by a lot, and just running with other drivers - and she
realised that she must have been through at least three of them before
seeing the flashes from the ones across the road, so although she didn't
actually *know* that she had been flashed at all, she reasoned that if
she had, it may have happened three times ...

So, that's the full story :-)

Its worth keeping in mind that they are not usually set to trigger any
lower than at the ACPO guideline speed (10% + 2mph), so 77mph on a
motorway, and vehicle speedos are not permitted to under read - hence
most err on the side of caution. Hence a speedo indicated 70 mph may
often mean an actual speed somewhat less than that.

Combine those two, and in many vehicles you would need to be doing an
indicated 85+ to have a problem.

--
Cheers,

John.


Every couple of weeks, we get a 'suitcase' speed measuring and
displaying gizmo bolted onto a lamp post coming into our village. As
that is reading 30 mph, the speedo in my Focus is indicating 34 mph

The ones that pee me off flash up 30 when you drive toward them at a GPS
indicated 26 or 27... you can tell that someone has "calibrated" it to
trigger on a speedo "30"


--
Cheers,

John.

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