The line will be operated automatically without drivers enabling services to be provided for 20 hours a day. Trains will run at 205-second intervals with the objective of carrying 3400 passengers\/h\/direction. The line is expected to carry 32 million passengers a year rising to 55 million by 2040, and two extensions are planned.\r\nThe line has been constructed as a public-private partnership. Siemens was the main contractor for the turnkey project, with GS, Korea, responsible for the civil works. Siemens supplied a fleet of 15 two-car Val 208 NG trains, and was responsible for the train control system, the control centre, and the depot.