Chennai's Metro Expansion: A New Corridor to Avadi and Pattabiram

The Tamil Nadu government has granted administrative sanction to Chennai Metro Rail Limited (CMRL) to begin preparatory works for the proposed 21.76-km Koyambedu–Avadi–Pattabiram metro corridor, even as the project awaits final approval from the Union government.

The state government’s order, dated August 18, permits CMRL to initiate land acquisition, utility shifting, surveys, traffic management planning, and tree replantation activities. The elevated corridor, part of Chennai’s expanding metro network, will run along the Outer Ring Road and include 19 stations, with key stops at Ambattur Estate, Avadi Railway Station, and Pattabiram.

While the project cost is estimated at ₹9,928.33 crore, the Tamil Nadu government has allocated ₹2,442 crore as subordinate debt to fund early-stage activities. Of this, ₹188 crore has been earmarked for surveys, investigations, and tree management, while the majority will support land acquisition and structural preparations.

The Detailed Project Report (DPR) was submitted to the Centre in May 2025. However, final approval is pending until the state submits a Comprehensive Mobility Plan (CMP), a required component for central funding.

Local residents and commuters have welcomed the state’s move and urged the Centre to expedite approvals, citing high daily commuter volumes and the urgent need for improved public transport in the region.

News by Rahul Yelligetti.