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TermsDefinitions
In-Flight TimeThe total time an aircraft is in the air between an origin-destination airport pair, i.e. from wheels-off at the origin airport to wheels-down at the destination airport. ( Airline On-Time Performance Data )
Interstate Highway, Freeway, or ExpresswayA divided arterial highway for through traffic with full or partial control of access and grade separations at major intersections. ( Nationwide Personal Transportation Survey (NPTS) )
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