That graph also doesn't show the staggering improvements in the vehicles themselves.
- ABS
- ESC
- crash safety ratings (incl pedestian impact)
- improved braking, ride, handling, tyre performance etc
Also certain "high risk" roads have been improved (although there's plenty of room to improve). eg. the Melbourne-Geelong road was 2 lanes, 110kph, had significant hills and blind crests. Now it's three lanes, better visibility, shoulders etc. So even if the limit had stayed at 110kph there'd have been an accident and fatality decrease. Except the limit was cut to 100kph so no doubt "it's the speed reduction" that made the difference......
IME - if we focused more on keeping those with BAC > 0.05 and those drug-affected (by whatever measure and/or substance) off the roads, and educated safe driver behaviour (no tailgating, keep left) and enforced all of these things, driving would be far better for all than the focus on not being 2kph over the speed limit (with consequent speedo watching instead of traffic watching) and "if i'm under the speed limit i'm ok".
I also think it's time for a total re-think of the car/bicycle interface with separated space on the roads - in the inner suburbs this would include designated "bike" roads and designated "no bike" roads (particularly during peak hours). This would also entail an improvement in sequencing of lights etc.
The minority that attend hospitals are people doing 65kph in a 60kph zone. They are those who are BAC >0.05, drug affected, driving whilst too tired, or generally shouldn't have been driving in the first place.
The other factor that has proven difficult to address (and I note the comments earlier in the thread re: mobile phone) - a number of times i've seen those stopped at lights texting etc - only to miss 10-15 seconds at the green and subsequent following cars not get through. Whilst they haven't "hurt" anyone, IMO it contributes to congestion, frustration and anger on the roads.
As I say, all this is IMO. I could go on for hours on this topic (i'd held my nerve from posting but finally gave in!).
I might add - I'm all for speed and red light camera on intersections (the last place you should be speeding is through an intersection). But on a straight and flat bit of highway, in the dry, with little traffic - sure, 150kph+ isnt appropriate. But 105kph? When the manufacturer margin for error is 10%......
(I could also get started on "why arent speed limits 130kph on major freeways"......)