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AIR LANDING FACILITIES airports in Illinois Amtrak billion ton miles border Illinois border of Illinois BUREAU OF SYSTEMS BUS TRANSIT buses Calumet Harbor Calumet River certifications Chicago area Chicago River coal commercially navigable commodities commuter rail companies Deep Sea Ports Department of Transportation Federal Federal-aid heliports Illinois Airport Illinois amounted Illinois and Michigan Illinois Aviation Illinois Department Illinois Illinois Illinois River Illinois Waterway increasing steadily INTERCITY RAIL Kaskaskia Lake Michigan Lawrence Seaway licensed drivers line haul carriers Louis Michigan Canal mile canal Mileage miles are operated miles of railroad million passenger miles million passenger trips Mississippi MISSOURI number of passenger number of registered port districts Port of Chicago Products RAIL FREIGHT railroad in Illinois registered pilots restricted landing areas ridership river systems roads and streets Rock Island scheduled service serve Illinois shipments Springfield surpassed in total traffic TRANSPORTATION FACTS TRANSPORTATION WISCONSIN trucks U.S. Department urban areas vehicle miles Waukegan Harbor