The Chennai Metro (Tamil: சென்னை மெட்ரோ) is a rapid transit system in Chennai, Tamil Nadu, India. The Phase I of the project consisting of two corridors is under construction. The elevated section of the project is scheduled to be operational by 2013 and the entire project is scheduled to be completed by the financial year 2014-2015. About 55% of the corridors in Phase I is underground and the remaining elevated.
(taken from Wikipedia)