|Volume of Freight by Weight|
This map above shows volume of freight by weight within the continental U.S.--green for Rail, blue for inland waterway, red for the interstate highway system. The heavy green line shows coal moving from the Powder River coal fields of Wyoming toward coal plants in the east. The thickness of the lines reflect relative volumes. The thickness of the blue line shows how significant Mississippi and Ohio River barge traffic remains. Goods still move by water. - Maps of infrastructure by Peter Sage
Peter has a bunch of maps showing US infrastructure. I just pulled this one because of the Powder River coal trains.
Via Posthip Scott