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Chennai Metro Phase 2: Underground Tunneling Hits Major Milestone in Core Corridor

CMRL accelerates tunneling works across Corridor 3 and 5, setting the stage for integrated multimodal transitions by late 2027.

12 October 2026VizhiTN Infrastructure & Transit Desk6 min read
Chennai Metro Phase 2: Underground Tunneling Hits Major Milestone in Core Corridor
📷 Visual Archive • VizhiTN Field Desk✓ Verified Story

Why this matters to Tamil Nadu

Reduces daily commuting time across congested arterial corridors like Kellys and Royapettah by over 40 minutes. Integrates seamlessly with suburban rail and MTC bus terminals to build a unified multi-modal urban transit grid. Employs advanced Earth Pressure Balance Tunnel Boring Machines (EPBTBMs) to ensure structural safety in dense residential areas.

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Key Highlights

Essential facts and key takeaways

4 points
Project Corridor Length: 118.9 Kilometers across 3 corridors
Nodal Agency: Chennai Metro Rail Limited (CMRL)
Technology Used: Earth Pressure Balance Tunnel Boring Machines (EPBTBM)
Key Interchanges: Thousand Lights, Royapettah, and Mylapore

Timeline

Chronological developments

4 events
1
July 2023
Initial underground boring clearance granted
2
January 2025
Breakthrough achieved at key core stations
3
November 2026
Track laying and electrical integration targeted
4
Late 2027
Phased commercial operations and public rollout

Official Sources

Verified links & documentation

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