‘The latest statistics confirm that casualties on Scotland’s roads are at the lowest levels since records began. Through actions taken by all those involved in improving road safety, the longer-term trends show a 50% reduction in fatal injuries, a 39% reduction in serious injuries and a 61% reduction in child fatalities compared to the 2004-2008 baseline figures.’

Could the "controversial" use of average speed cameras, so often criticised by Conservatives, have played a part in this?
https://thoughtcontrolscotland.com/2018/10/26/child-deaths-on-the-road-fall-61-to-lowest-level-ever/