Kolkata Metro Line 2, also known as the
East-West Metro and
Green Line, is a rapid transit line of the Kolkata Metro in the Indian state of West Bengal. It currently consists of an operational section between Salt Lake and Sealdah, and will eventually connect Howrah by going underneath the Hooghly River, with an eastern extension also planned for Teghoria. It would consist of 17 stations from Teghoria (Haldiram) in the east to Howrah Maidan in the west, of which 11 would be elevated and 6 would be underground, with a total distance of 22 km (14 mi). It is expected to derive a very high ridership since it will connect India's two largest commuter railway and long-distance railway terminals along with two of its largest business districts. It will also connect the industrial hub of Kolkata i.e. Howrah and the IT hub of Kolkata i.e. Sector 5. Line 2 has India's biggest underwater metro tunnel along with the deepest metro shaft. In the deepest metro shaft, Howrah metro station will be the deepest metro station in India, at a depth of 33 meters. The first phase between Salt Lake Sector V and Salt Lake Stadium was inaugurated by Union Railway Minister Piyush Goyal on 13 February 2020 and commercial services started from 14 February 2020.