PM Modi inaugurates India's first underwater metro in Kolkata, a significant infrastructure milestone despite construction delays due to technical challenges.
India’s first underwater tunnel for metro connectivity in between Howrah and Kolkata is underway and will be fully functional by 2023.
The Kolkata Metro Rail Corp.’s aim to expand the Kolkata Metro and create a 520 metre underwater tunnel has hit massive roadblock leading to a massive inflation in its costing.