relevant to helicopters, airplanes, jet aircrafts, etc.
relevant to vehicles which run on tracks (trains, trams, etc.)
This could be achieved by the active participation of local/national rail transport authorities, NGOs and general public in order to identify the current barriers and prioritize the problems as funding won't be sufficient to cover all issues
relevant to boat, ship etc., over a body of water, such as a sea, ocean, lake, river, etc.
the combination of different means of transport