In NYC (and it is a regionalism) we wait on line-- (and orders other-- "Wait your turn-- get on (the) line!

Interesting, of troy. I grew up 30 miles West of NYC in central New Jersey (Plainfield), was always in and about New York, and I also lived in New York for awhile along the way. And I honestly can say I have heard and used both variations all my life...never did ponder the whys and wherefores of it. Get on line!/get in line!...waiting in line/waiting on line...were always of interchangeable usage in my mind. But..."cut in line,""don't cut in line!" or "your cutting in line" was always in ! Never knew until this thread that these were any different elsewhere, or of regional nature!