 Due to an ongoing rail system maintenance program, weekend headways are variable and may range from the normal 20 minutes to as much as 24 minutes, with the Green and Red lines occasionally being truncated all weekend.During weekends in the latter case, headways along the shared lines will increase from 10 minutes to 20 minutes

Before budget cuts in 2005 affected the rail system, MARTA originally operated trains every eight minutes during the day on weekdays on each route, with the North-South Line operating on a combined four-minute headway between Lindbergh Center and Airport stations on the trunk.On Saturdays, it was every ten minutes (five minutes combined on the North-South Line trunk), and on Sundays it was every 15 minutes (7.5 minutes on the North-South Line trunk).