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Acknowledgments US Department of Transportation - BTS

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percent reporting <strong>of</strong> enplanements, departures, and tonnage information by large certificated U.S. air carriers via <strong>BTS</strong>Form 41.Prior to 1993, the AAS included all scheduled and some nonscheduled enplanements for certificated air carriers butdid not include enplanements for air carriers <strong>of</strong>fering charter service only. Prior to 1990, the freight category wasdivided into both freight and express shipments and the mail category was divided into U.S. mail (priority andnonpriority) and foreign mail. Beginning in 1990, only aggregate numbers were reported for freight and mail.TABLE 1-45. Air Passenger Travel Arrivals in the United States from Selected Foreign CountriesTABLE 1-46. Air Passenger Travel Departures from the United States to Selected Foreign CountriesThe International Trade Administration in the U.S. <strong>Department</strong> <strong>of</strong> Commerce publishes the U.S. International AirTravel Statistics Report annually. The passenger data is based on information collected by the U.S. Immigration andNaturalization Service using the INS Form I-92. All passengers on international flights must complete the I-92 formwith the exception <strong>of</strong> those passengers on flights arriving or departing from Canada.The international passenger arrivals and departures data for Canada is obtained from Air Carrier Traffic at CanadianAirports, which is published by Statistics Canada. Three surveys are conducted by Statistics Canada in order tocollect the necessary passenger data. Since all data is not received by the time <strong>of</strong> publication and data isoccasionally updated or resubmitted by the participating carriers, data should be considered preliminary for the yearsreferenced in the source publication.TABLE 1-49. U.S. Ton-Miles <strong>of</strong> FreightAir CarrierAir Carrier Traffic Statistics, published by the U.S. <strong>Department</strong> <strong>of</strong> <strong>Transportation</strong>, Bureau <strong>of</strong> <strong>Transportation</strong> Statistics(<strong>BTS</strong>), Office <strong>of</strong> Airline Information (OAI), is the source <strong>of</strong> these data. Large certificated U.S. air carriers reportdomestic freight activities to OAI via <strong>BTS</strong> Form 41.The information reported in the table represents transportation <strong>of</strong>freight (excluding passenger baggage), U.S. and foreign mail, and express mail within the 50 states, the District <strong>of</strong>Columbia, Puerto Rico, and the Virgin Islands. It also covers transborder traffic to Canada and Mexico by U.S.carriers. The data does not include information on small certificated air carriers, which represent less than 5 percent<strong>of</strong> freight ton-miles.Intercity TruckThe data are estimates from <strong>Transportation</strong> in America, published by the Eno <strong>Transportation</strong> Foundation, Inc. (Eno).Eno's estimates <strong>of</strong> intercity truck ton-miles are based on historic data from the former Interstate CommerceCommission (ICC), estimates from the American Trucking Association, and other sources. Eno supplements itsestimates by using additional information on vehicle-miles <strong>of</strong> truck travel published in Highway Statistics by theFederal Highway Administration. Users should note that truck estimates in the tables do not include local truckmovements.Class I RailThe data are from Railroad Facts, published annually by the Association <strong>of</strong> American Railroads (AAR). AAR data arebased on 100-percent reporting by Class I railroads to the Surface <strong>Transportation</strong> Board (STB). The data representall revenue freight activities <strong>of</strong> the Class I railroads and are not based on information from the Rail Waybill Sample.The STB defines Class I railroads as having operating revenues at or above a threshold indexed to a base <strong>of</strong> $250million (1991) and adjusted annually in concert with changes in the Railroad Freight Rate Index published by theBureau <strong>of</strong> Labor Statistics. In 2000, the adjusted threshold for Class I railroads was $ 261.9 million. Declassificationfrom Class I status occurs when a railroad falls below the applicable threshold for three consecutive years. AlthoughClass I railroads encompasses only 1 percent <strong>of</strong> the number <strong>of</strong> railroads in the country, they account for over 71percent <strong>of</strong> the industry's mileage operated.Domestic Water Transport

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