40km Saves Lives

Today's Advertiser had a front page story "Slow Road To Safety' that featured Unley's 40 km speed limit. I was surprised in particular about the reduction in the total number of crashes. These have reduced from over 40,000 ten years ago to less than 23,000 now. So if you think you are seeing less crashes that is because you probably are. Doesn't seem to have worked for me, in the last 2 years I've had my car damaged twice while it has been parked in the street . Both times the offending driver left their name, well done to them. The benefit of reducing speed to 50km is also shown in the significant reduction in fatalities. So should we  further reduce the speed limit to 40km citywide, not just in Unley?