There is a lesson for the rest of the world, including large places like Australia which rely upon trains, not as much as the US, but still a considerable amount, for mass transport. That includes state to state transport of toxic chemicals, which can be best done by train, rather than trucks. However, train derailments are always a possibility, as the Ohio disaster showed, and there have been other derailments since, not without the toxic chemical release. As detailed at Natural News.com, the Ohio derailment has become an ecological and health disaster, with dioxins, one of the most toxic non-nuclear substances known to man being mass released. The dioxins were created when the authorities burnt the spilt polyvinyl chloride, creating an even greater problem.
So, not only does the rail services need a massive safety upgrade, but so do the environmental protection agencies in dealing with chemical spills.