New Delhi, July 30 -- The Delhi Metro Rail Corporation (DMRC) has achieved a significant construction milestone in Phase 4 with the completion of underground tunnel between Tughlakabad and Tughlakabad Railway colony on the Tughlakabad-Aerocity corridor of Phase-IV.

The breakthrough of the Tunnel Boring Machine (TBM) at the Tughlakabad Railway colony site of the Delhi Metro took place in the presence Sh Naveen Gulati, Member (Infrastructure) Railway Board and senior officials of DMRC.

A TBM broke through at Tughlakabad Railway colony Station after a boring 0.792-kilometre -long tunnel. This tunnel breakthrough was achieved using a mammoth 91-metre-long TBM. Two parallel circular tunnels for up and down movement are being constructed on t...