As one of two interchange points between the Green and Red Lines, Union station is one of the most complex stations of the Dubai Metro. Spanning 25,000 square metres (269,098 sq ft), it is the largest underground station in the world.[1] Both lines utilise a side platform setup with two tracks each; the Green Line tracks approach the station from the west below Al Maktoum Road and turn northwards underneath Omar Bin Al Khattab Road, while the Red Line crosses Dubai Creek and travels below Omar Bin Al Khattab Road before turning sharply eastward underneath Al Rigga Road.