Our country's freight railroads are known to carry the most valuable rich objects in the world. Oil and coal. But in recent months, the demand for those 2 resources is decreasing.
http://www.wsj.com/articles/freight-rail-traffic-tumbles-on-falling-coal-oil-demand-1438982945
http://www.wsj.com/articles/freight-rail-traffic-tumbles-on-falling-coal-oil-demand-1438982945