From 2012 to 2013, the transport of crude oil by major freight railroads spiked, increasing nearly 75 percent according to the American Association of鈥�

Railroads are increasingly becoming the preferred means of shipping the masses of oil being produced in North Dakota and surrounding states. The railroad industry is eager to fill in for the lack of pipeline capacity. But some say the train growth needs to slow down.

The National Transportation Safety Board is calling for the swift enactment of tough new standards on trains carrying crude oil. With the huge increase in oil shipped by rail across North America, safety officials warn another major disaster could be looming.