You can get a clear understanding of the impressive results of road safety policies with a quick look at this excellent article. The summary:
A substantial reduction in deaths from road traffic collisions was observed between 2000 and 2010. Between 2001 and 2010, with the implementation of new road safety policies, there were 26 063 fewer road traffic collisions with victims than expected, 2909 fewer deaths (57%) and 25 444 fewer hospitalizations. The estimated total cost savings were around €18 000 million. Of these, around 97% resulted from reductions in lost productivity. Of the remaining cost savings, 63% were associated with specialized health care, 15% with adapting to disability and 8.1% with hospital care.In my opinion, next steps for additional reductions in traffic accidents should be adressed with investment in renovation of roads. A clear example of such need is this recent demonstration or the current and tragic situation of N-II and other roads in Girona. You can follow it by twitter at #VergonyaN2. Otherwise, you can watch this documentary, and you'll confirm how politicians can neglect citizens for years. After a decade, Catalonia is still waiting for public investment coming from neighbouring country. Hopefully we will not have to wait for another decade. Soon we'll just keep our taxes and we'll belong to a new State. I't just a compelling argument to prevent mortality.
PS. WHO on Health in All Policies.
PS. On Moisés Broggi death. An interview included in the book "What Catalans want".