The Youth Welfare Minister of Tamil Nadu inaugurated the tunnelling work for the Chennai metro rail phase-II at downtown Royapettah on July 22, 2024. The Tunnel boring machine (TBM), Bhavani covered about 910 metres between Royapettah and Dr. Radhakrishnan Salai (corridor-3).
The Chennai metro phase II project involves the development of 118.9-km three metro corridors (corridor III, IV and V) in Chennai, Tamil Nadu. It is mostly underground with an elevated section confined to a few short stretches and consists of 128 stations in total.