1) Type of travel 
Business travel is travel done in the course of business or work, other than the daily commuting between home and workplace. ==Reasons for business travel== The necessity to conduct business travel may have many reasons. A few are stated below: Notes Citations Sources ...
(from the article `airport`) Passengers are frequently classified as business or leisure, scheduled or charter, originating or destined, and transfer or transit. Business ...
Travel between places of work, or to a place of work to carry out duties there, but excluding private travel and ordinary commuting.