Underground works in urban areas are the need of the hour. Mostly, all the cities in India are developing their underground metro transit systems, but Delhi is the first city to initiate this level of development and tops the chart. Phase-III of DMRC envisages 140 km of metro systems, out of which 50 km is underground.
There are cities like Delhi, Kolkata, Chennai, Bangalore, etc., where the metro rails are already operational and the construction work is underway for further expansion of the existing metro network. Then there are cities like Hyderabad, Lucknow, Kochi, etc., where the project execution is underway for their respective maiden metro projects.