NOTE: This map is based on
information from the Rail Waybill Sample. Because
these data are drawn from a survey, theyare subject
to sampling errors that could affect the estimates of shipment size and the
relative positions of the states.
SOURCES: U.S. Department of
Transportation, Research and Innovative Technology Administration, Bureau of
Transportation Statistics, based on data from Association of American
Railroads, Railroads and States—2002 (Washington, DC:
2004), available at http://www.aar.org/, as of April 2005.
