Chennai Metro
![](/Images/godic/202501/05/Chennai_Metro_Rail_at_Koyambedu5901.JPG")
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![rough sketch of chennai metro route maps for phase 1&2 including proposed extension](/Images/godic/202501/05/Chennai_metro_phase2xtn5901.png")
![](/Images/godic/202501/05/TamilNadu_Logo.svg5901.png"){kind=logo}
The Chennai Metro Rail is a rapid transit system in Chennai, Tamil Nadu, India. Phase I of the project consists of two corridors covering a length of 45.1 kilometres (28.0 mi). The first line of Phase 1 has been partially completed and is open for public service. About 55% of the corridors in Phase I are underground, with the remaining corridors elevated.