Australian traffic camera tolerances are also set ridiculously low, and there are far too many variations in limits. I fully support 50kmh urban street limits,

Australian traffic camera tolerances are also set ridiculously low, and there are far too many variations in limits. I fully support 50kmh urban street limits, but the open road sections should have a day/night limit, where the day limit is 130, like most of Europe and some parts of the US. There should also be limits to how often a speed limit can change in a single stretch of road, and highway speed zone changes should have a minimum of three signs at even spacing to indicate the change approaching, at the spot and one more reminder. There should also be a ban on concealed traffic cameras - getting a fine long after the event has very little effect on the behaviour, apart from generating feelings of injustice.