It won’t take long — perhaps after the first oil train derailment — before the Obama administration declares shipping oil in tank cars to be too hazardous for railroads to engage in without further governmental regulation.
And then the feds will enact regulations that all-but bans the shipment of oil by rail — making the rules and regs so onerous that the railroads will find it easier to refuse such shipments, rather than handle them...
Depends on the size of the spill. Oil tanker car derailment as already happened.
Workers removing oil from cars after train derails near Penobscot River
http://bangordailynews.com/2013/03/07/news/penobscot/freight-train-pulling-oil-tankers-derails-in-mattawamkeag/
Oil Spill From Train Derailment
http://www.epa.gov/osweroe1/docs/oil/fss/fss04/nakad_04.pdf
Notification to National Response
Center of an oil spill from a train derailment on July 11, 1999.