New Delhi [India], March 6 (ANI): Prime Minister Narendra Modi is set to inaugurate India’s first under-river metro tunnel built in Kolkata on Wednesday. In a monumental development set to transform urban transportation, PM Modi is slated to inaugurate several key metro and rapid transit projects across countries, marking a significant stride towards enhancing urban mobility and connectivity. The Kolkata Metro extension, featuring the Howrah Maidan-Esplanade Metro section, includes the first transportation tunnel in India to pass under a major river, representing a critical milestone in the co…