In 1969, the Metropolitan Transport Project was formed under Indian Railways.

In 1971, MTP proposed to build 5 rapid transit lines for Kolkata.

[1][2] With help of Soviet specialists (Lenmetroproekt) and East German engineers, prepared a master plan to provide metro lines for the city of Kolkata, totaling a route length of 97.5 km in 1971.

From July 2019, KMRC handed over the operations of Green Line to Metro Railway, Kolkata.

Some special arrangements and services are made especially during Durga Puja and Depavali every year.