<< It is the traffic authorities statement that there will be no tolerance that is the problem. >>

Bazz, where does this come from? Which traffic authority has made this statement?

I’ve never heard anything in the media about there being no tolerance.

Ludwig, it was the minister in NSW stating that it would be the policy.
It got quite heavy coverage at the time.
The threat was if you drove at 61km/hr you would be booked.
Whether you would be booked at 60.5 km/hr was never stated.

Anyone whoever calibrated a measuring instrument would have scoffed at the statement.

Is Mise, it was only a few years back that the NT speed limit was declared to be 130 on the open road where there was previously no speed limit.

Now they are trialling changing it back again:

http://www.abc.net.au/news/2014-02-01/speed-limits-shelved-for-nt-highway-sports-cars/5232388

Pretty dumb if you ask me. Surely 130kmh is fast enough!

Bazz, I live in QLD but I’ve been driving in NSW over the last four weeks, in areas of high police presence and speed-limit regulation (the Sydney – Newcastle area and the coast up to Tweed Heads).

I listen to the ABC radio news a fair bit…. and I’ve heard nothing about a zero-tolerance approach to speed limits.

And my observations of how people drive, wherever I go, indicates that there is nothing of the sort happening.

I appreciate your concern about calibration and error margins, but I think that by far the biggest issue here is the RANK MISMANAGEMENT of the policing of speed limits!

We absolutely need to be told just what is being policed!

What is the leeway?? ?? ?? If there is no leeway, then the message needs to be very loudly and widely expressed so that everyone, not just in NSW but in the whole country, knows what is going on.... and knows it BEFORE a zero-tolerance policing regime starts!

Ludwig, I can't put a date on it, it was some time ago, perhaps one
or two years ago.
Perhaps it never got enforced if the Police realised how impossible it is.
However if their instrument shows 60.01 km/hr then they can book you
because you have exceeded (their) speed limit.
I believe there have been challenges on accuracy but about the wrong
conditions of operation, not instrumental accuracy.
The difficulty is the instruments are considered to be a "scientific instrument"
and its accuracy cannot be challenged. Well I have news for them.
The calibration certificate will say otherwise.

Anyway they have to comply with Commonwealth law as a monetary charge
is involved.