itxtme: The most bizarre thing about the entire policy is the distinct lack of evidence to support it. They had a very succesful campaign last year (or year before) in the sense that nobody died on the roads over a holiday period. Since then the road deaths have been higher. Yet they still claim it reduces road deaths... Anybody with half a brain can work out a sample size of one holiday period is hardly rock solid validation for a massive assumption.
Take this one step further, and there has been no data to indicate speed as a crash factor in deaths except when it is excessive, ie. well over the "tolerance" levels.
To me these campaigns are about presence, with a fingers crossed approach to road policing. Publicly it looks like they are doing all that they can, in reality that is far from the truth.
NZ Police, and Government in general, have never let a minor thing like a lack of sound evidence get in their way of a propaganda campaign. It's all a case of appearing to be doing something that is popular to win support for the next 3-year trough session. Speed is an easy one because it's a common misconception that speed is the problem, not bad driving and crashing. Sure, if you're going faster then when you crash the likelihood of injury is higher - but what about when you don't crash? People that choose to go faster than is prudent at the time will do so regardless of the posted speed limit.
Also, beware the term "excessive speed" - when used in the road crash statistics it refers to speed considered too fast for the conditions. Not simply in excess of the posted speed limit.
Speed is also very easy to measure, especially from a distance, and turn into a strict liability offence. So it's easy to police.
It's my belief that speed is not the problem people believe it is. People simply don't take driving seriously enough - that's the real problem. When you treat people like children, guess what they become.
There aren't many examples of unregulated speed being tried - but the one in Montana where daytime speed limits were removed is one I always remember. Road trauma dropped. People started to actually engage their brains in the exercise of driving.
Part of the the trouble with having a posted speed limit is people think that you can drive at that speed on that road, all the time, because in their mind someone has measured and decreed that it's safe to do so, instead of reading the road conditions.