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It's not that simple, trust me. :)
*cue hippy going on the Internet and researching the hell out of it.* :)
The difficulty doesn't lie so much in the technology and its applications, but in the political opposition. For instance, when officers set up traffic control points, there are some self-appointed vigilantes around who will question every aspect of the set-up and whether they're recording speeds correctly, etc. Campaigners against speed cameras have also in the past put up such opposition (often exploiting problems with legislation) that officials were tied up just dealing with it all, and speed camera provision was watered down, e.g. with warning signs and what have you.
That's not to say such enforcement shouldn't happen, only that there's a bit of history. Not knowing about Australia, my guess would be that primary legislation there is very different, and quite likely more up-to-date. In the UK, much still relies on the 1835 Highways Act. :)
Oliver Schick-
Ah, yes, but our politicians don't give a fuck about the plebs opinions, much like over here, they just choose to show it in different ways. Aussie pollies see $ income by adding speed cameras, British pollies see £ savings by cutting police.
Yes, I'm oversimplifying things. But that's how I get shit done while everyone else is busy wondering if doing x will upset person y, meanwhile everything is burning down.
hippy
Is it? Pretty sure that the same cameras that do red light runners get speeders. Piece of piss basically. I don't know what the cameras cost but I bet they pay themselves off pretty bloody quick.