Originally Posted by
Palal
Metro line 4 will operate as a separate line during olympics and only for ticket holders, with trains running every 10 minutes. After the olympics they'll do the normal testing period 11am-3pm for a few months, and only in early 2017 should you expect things to open normally, and the line will be a continuation of Line 1.
Unfortunately they didn't install automatic train operation, so trains will be operated manually on the new line.
Actually, they will increase gradually the hours of operation after the Olympics, so it could actually start fully operating sooner than expected.
There's no autopilot system on Line 2, which has been operating for decades.