This is part two in a DeSmog investigative series examining why oil trains derail at higher rates than ethanol trains. More ethanol was moved by rail from 2010-2015 than oil, but oil trains derail at a higher rate and with more severe consequences. Part one addressed train length as a potential factor in derailments.
“Sloshing is an issue. It increases in-train forces. It would be like having a heavy box in the back of your SUV that is not tied down. If you have to slam on the brakes, what happens? The box slides forward into the back of the seat in front of it.”
That was former locomotive engineer and rail safety consultant Bill Keppen describing the effects of “sloshing,” a phenomenon which happens when the liquid contents of incompletely filled rail tank cars start to move — or “slosh” — back and forth during transport. According to Keppen and others in the rail industry, that can potentially increase the chance of a train derailing.