To everyone saying cops are revenue raisers I would have to disagree.
I have lost count of the amount of times I have gone past HWP vehicles at 10+ km per hour and they never came after me.
The long and thick of it is, if you don't want a ticket, don't break the law... it's not rocket science...
As a side note, I met a German tourist lately who was telling me that when he was caught speeding at 15km over the limit (in Germany) the fine was about $30-$40. The same fine here would be $254.
http://www.rms.nsw.gov.au/roads/safe...-offences.html