The combination of the Obama administration’s intransigence in approving the Keystone XL pipeline and the exponential explosion in the production of crude oil, especially from the Bakken formation in North Dakota, has put increasing pressure on alternative modes of transportation to get that crude to refineries and customers. But with the increasing use of alternative modes such as barges, railcars, and over-the-road tanker trucks has come a growing concern about safety.A series of rail accidents over the last several years has caught the attention of the Department of Transportation, and CNBC has tried its best to question the viability of...