The first two lines under construction are planned to open in 2015.
Four more lines are planned to be constructed in the near future, for a total of six.
This line had been planned in the 1920s, but was delayed several times since.
The first line is planned to open on 2014 but was delayed to June 2015.
The line is planned to grow to more than 1,400 products in a year from 450.
The line is planned to have an average interval of six minutes between each station.
The line is planned to open for commercial operation in September 2011.
At the same time, the first line is planned to be extended on the left bank by four stations.
Two other lines are also planned to be completed around 2020.
The first two lines are planned to open by 2015.
