The Tamil Nadu government has sanctioned a budget of ₹2,126 crore for preparatory work on a new metro line that will connect Chennai with the proposed greenfield airport at Parandur. The allocation covers ₹1,836 crore for land acquisition and ₹252 crore for preliminary civil works, paving the way for the project’s first phase up to Sunguvarchatram.
The new line is planned as an extension of Corridor 4 (Lighthouse–Poonamallee) and will be developed in two phases, according to the Detailed Project Report (DPR) prepared by Aarvee Associates Engineers and Consultants.
An official from the Chennai Metro Rail Limited (CMRL) noted that the phased rollout is deliberate: “By the time Phase I is complete, the airport will be ready, making it easier to link the metro to Parandur in Phase II.”
Trains on the corridor are expected to run at 80 km/h, with speeds potentially exceeding 100 km/h on the longer Sunguvarchatram–Parandur stretch.
The overall cost of the 53-km corridor is estimated at ₹15,906 crore, with Phase I accounting for ₹8,779 crore. The project will also integrate with the NHAI’s proposed elevated corridor between Poonamallee and Sriperumbudur.