The 15.6-metre-diameter machines will bore 3.9-km twin tunnels, 40 metres below ground, between Malad's Mindspace and Kandivali's Charkop as part of the Coastal Road North. Mumbai’s 22.93-km Coastal Road North project is moving closer to execution, with two of India’s largest tunnel boring machines (TBMs) expected to arrive in the city by January 2027.