Delhi Metro Phase 4 Marks Another Tunnel Breakthrough On Golden Line Stretch

In a significant development for Delhi Metro Phase 4, Delhi Metro Rail Corporation (DMRC) has achieved a successful breakthrough at the Tughlakabad Railway Colony station on the upcoming Golden Line.

Taking to X, DMRC shared images from last week, highlighting the completion of a 960 metre long tunnel stretch between Tughlakabad and Tughlakabad Railway Colony by Afcons Infrastructure’s Tunnel Boring Machine (TBM).

This stretch covers twin tunnel construction from Sangam Vihar to Sarita Vihar Depot which passes through three underground stations, namely Maa Anandmayee Marg, Tughlakabad Railway Colony, and Tughlakabad.

A separate tunnelling breakthrough on the same stretch had earlier taken place in June 2025.

A Tunnel Boring Machine (TBM), stretching 91 metres in length, broke through at Vasant Kunj Station after excavating a 1,550 metre long section, marking a key milestone in its Phase 4 expansion with the successful completion of an underground tunnel between Kishangarh and Vasant Kunj stations on the Tughlakabad–Aerocity corridor.

The Golden line, stretching 23.622 km from Aerocity to Tughlakabad, will connect around 15 key stations once complete, enhancing mobility across South Delhi. It is expected to be completed by next year.

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