You wouldnt get many cars doing 300kms+ (lets face it, when you look at all the cars in Oz, not many actually can) but you'd get lots of people sitting on 150-220kms. Like you say doesnt matter if you crash at 200 or 300kms, your gonna be fucked but you'd still get lots of people doing it over a year!

Its just a bandaid solution for other problems. Seatbelts are a major one as is alcohol amongst the natives. Together its a pretty deadly mix and alcohol education certainly isnt going to work.

The article doesnt say when it actually comes into affect tho!