Every 7 1/2 minutes someone is killed in a car crash (in the US) ... the same statistic is true of the frequency of major/minor RR derailment (in the US) ... poor track maintenance, poor wheel inspection, carmen who do not know how to do a proper inspection of trains in a yard ... not to mention weather and soil shifting.
The main point being: The US infrastructure is failing, and will continue to rot, due to negligence, and corporate cost cutting measures ... too few people to actually do the jobs, (too many chiefs, not enough braves).
Did I mention that there is a major/minor train derailment every 7 1/2 minutes (in the US) 24/7/365?
Ever listen to those US railcers, wobbling down the tracks, with wheel flat spots banging away on the railhead, on every wheel ? !
Only 7/8 th's of an inch of flange keeps all those wheels on the track ... that's 1096 roller bearings, 1096 flat spotted wheel treads, per train, traveling on spread, sagging, broken rail.
Murphy's law ... What ever can go wrong ... will go wrong !