As mentioned earlier, essentially, there are three streams of analysis: infrastructure, mechanical and operations, or human factors.
In each case, we've identified decreases in the infrastructure and mechanical part of it, but the proportion of human factors has been increasing. Much of the follow-up that we've conducted on these various investigations have led to recommendations, and some of those recommendations have been highlighted as part of watch-list issues.
In terms of the general safety issues that are of highest priority in the railway industry, perhaps we can draw you to our watch-list. A few that come to mind immediately are following signal indications; fatigue, certainly, has been added; and on-board voice and video recorders allow us to better understand some of the interactions and causations of accidents.