Higher fares apply for access to outer zones.
Magnetic stripe fare cards may be purchased from touch-screen based vending machines, or ticket windows. A recend extension to the airport has met with wide approval, and was well-utilized during the 2000 Olympics. Double doors are placed offset from car ends at platform height, and car centers have a lower and upper level. Older carriages are not air-conditioned, but newer ones are. Four, six, and eight car trains are run.