2. Through the use of GIS Information Data Systems

17. Amtrak Railway map

18. Railroad map of the US ca. 1918

20. Sources: http://www.mapindia.org/2005/papers/Transportation/268.htm http://members.kos.net/sdgagnon/te3.html http://railpassengerusa.com/events.php http://www.neiu.edu/~rgutierr/red_city/trains.html http://www.flickr.com www.historicalstockphotos.com www.oursurprisingworld.com http://commons.wikimedia.org/wiki/File:Leviathan_63_Train_Festival_2009.jpg www.americanghostsandhauntings.com http://memory.loc.gov/ammem/gmdhtml/rrhtml/rrintro.html http://www.sdrm.org/history/timeline/> http://www.american-rails.com/railroad-history.html http://railpassengerusa.com/events.php> http://www.mapindia.org/2005/papers/Transportation/268.htm http://clintoncountyohgis.org/surveys_railroad_row.htm http://www.ctre.iastate.edu/educweb/ce352/lec24/gista.htm http://wikipedy.com/trans_continental_railroad_facts.htm http://ptatransitauthority.blogspot.com/2009/03/modern-locomotives.html http://www.esri.com/industries/railways/index.html http://www.trainweb.org/mdamtrak199/trainsounds.html http://www.dieselairhorns.com/sounds.html?album=5