The true problem here is that the drop in revenue growth seems to be occurring throughout the U.S. railroad industry. Union Pacific (NYSE: UNP) reported a rate of -9.74% on June 30, 2015, while CSX reported a rate of -5.55% on the same day. The other big publicly traded U.S. railroad operator, Norfolk Southern (NYSE: NSC), reported a rate of 4.54% on March 31, 2015.