Kolkata Metro Railway revised its plan for the Purple Line's Esplanade-Eden Gardens extension by deciding to use tunnel ...

A giant Indian-made tunnel boring machine has arrived in Kolkata to continue work on the underground section of the Metro's Purple Line ... directly unloaded in the shaft built inside St Thomas ...

650-tonne tunnel boring machine (TBM), primarily made in India, has reached Kolkata after a 1,653 km journey from Tamil Nadu's Alinjivakkam, marking a major milestone for the city’s Purple Line ...