Tamil Nadu Govt Approves Line 4 Extension of Chennai Metro Phase 2

The Tamil Nadu Government has granted formal approval for the construction of the Chennai Metro Project under Phase 2’s Line 4 Extension, spanning 52.94 km and connecting Poonamallee – Sunguvarchatram – Parandur. The total cost of the project is estimated at ₹15,906 crore.

Line 4 of Phase 2 currently extends 26.1 km from Lighthouse to Poonamallee Bypass. The approved extension will be implemented in two phases — Phase I from Poonamallee to Sunguvarchatram, and Phase II from Sunguvarchatram to Parandur.

The government has also approved the implementation of the first phase of this corridor, covering 27.9 km from Poonamallee to Sunguvarchatram, at an estimated cost of ₹8,779 crore. According to officials from CMRL, this section will feature 14 stations.

The Detailed Project Report (DPR) for this section will be forwarded to the Centre for approval.