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TermsDefinitions
GatewayIn international travel, the port where customs clearance takes place. ( Airline Origin and Destination Survey (DB1B) )
Great Circle DistanceThe shortest distance between two points on the earth's surface. ( Commodity Flow Survey (CFS) )
Great LakesA single mode specially created in ORNL's transportation network for the Commodity Flow Survey for mileage calculations which involve transportation via the Great Lakes between the origin and destination ZIP Codes (see the Mileage Calculations section for more details). ( Commodity Flow Survey (CFS) )
Group QuartersCommunal housing, such as dormitories, military bases, prisons and nursing homes. Group quarters are distinct from households. ( Census Transportation Planning Package (CTPP) 1990 )
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