Avg speed 30-33 kmph, and rapid like Airport metro etc having 35 kmph, while top speed, line has six stations (Dhaula Kuan and Delhi Aerocity became operational on 15 August 2011), with some featuring check-in facilities, parking, and eateries. Rolling stock consists of six-coach trains operating at intervals of ten minutes and having a maximum speed of 135 km/h (84 mph)