RE: Another speeding ticket question

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <000501bf1322$da9cfb00$7b214f0c@rossato1> "Bob Rossato" writes:

> > However...  they are not that reliable.  If either the speedometer isn't
> > calibrated correctly or the radar gun isn't calibrated right, than it can
> > VERY easily come up with an inacurate speed reading.
>
> My understanding of moving RADAR is that it takes a reading from a
> stationary object, e.g. the road, to determine the speed of the cruiser and
> compares it to the reading from the moving object, the victim, to determine
> it's speed.  They are not hooked into the vehicles speedometer.

Not in the UK - the carrier vehicle speed is derived from the vehicle,
not from any stationary objects.  The reason is the presence of other
vehicles going in the same direction or other direction - if there were
to be the slightest chance of the RADAR locking on to one of these instead
of the road (and most are, in RADAR reflection terms, bigger targets)
then the whole mechanism would be unsafe.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone: 07785 302803   Fax: 0870 0883933