The line, entirely double-track, was officially inaugurated on 8 May 1992.
The second line was laid in 2011-2012 and was inaugurated on 8 October 2012.
The line and the services were inaugurated on 25 November 1999.
Work began July 6, 2009, and the line was inaugurated on June 23, 2012.
When the line was inaugurated its length was 40 km.
Nine months later, on 31 May 1869, the 15 kilometer-long line was inaugurated.
With construction of the first section completed, the line was inaugurated on July 14, 2007.
The first line was inaugurated on June 18, 2007, with 15 of 34 proposed stations completed.
The second part was opened in 1975, when the blue line was inaugurated, and the platform is around 28-31 meters under the ground.
The line was inaugurated on 24 July 1888.
