There are two things: train accidents and personal injuries. For personal injuries, in the States they have a different regime from us; everything requiring more than first aid treatment becomes reportable, and they have guidelines explaining what the first treatment is. In Canada, it's whatever's considered a disabling injury, which is lost time, modified duty, loss of a limb, fatalities, and things like that.
So I would argue that in terms of personal injuries, when you compare both regimes, they are probably quite similar—although you may get a few more reportable injuries in the States, because they calculate more than the first aid treatment.
A train accident is a different thing: it's a monetary threshold.