I will start, and Luc will complete.
Your first question is whether it is possible to eliminate all accidents. No, it's not possible to do that in any of the modes that we supervise. It's not possible in aviation, on the roads, in the water, or on the rail.
Are there standards, or best practices, if you want? That's done by sharing best practices across different countries. We like to think we have pretty good standards here in Canada. In fact, before 2002 when the accidents started to increase year after year until they peaked in 2005, we had a very good story to tell in rail, but the situation degraded somewhat. Unlike aviation--and that will address also your previous question--and marine, where we have international bodies under the UN--ICAO for aviation and IMO for marine--there are no ways to share best practices on a formal basis.
We have a similar situation on the road, I should add, because for the roads there isn't a similar body either. There is talk about creating one.
Maybe Luc can respond further.