Most ethanol in the US is transported by train since there are technical barriers to piping ethanol. The fuel can be contaminated by water intruding in the pipes.
Market watch : Verasun and Archer Daniels Midland (ADM) are going head to head in US ethanol production. Some analysts predict that the now smaller Verasun will replace ADM as the top producer of ethanol in the US.
by alternating ethanol and unleaded gasoline in the pipeline.