According to the U.S. Energy Information Administration (EIA), rail cars spent twice the time between loading and unloading in the Midwest than last year during the same period, and train speeds were also slowed.After a week of ethanol futures prices exceeding unleaded gasoline prices, things have settled back into a more normal pattern. Ethanol prices started climbing in early February, largely driven by the impact of severe winter weather on rail transportation. About 70 percent of all ethanol comes from the Midwest, and rail loading in and out was impacted by the weather. That backup left an ethanol shortage on the coasts. The typical spread between New York Harbor and Chicago spot ethanol prices is typically about $0.25, but it reached...