Chennai Metro Rail in an official statement said that its Phase II will cover 118.9-km long network, covering another 93 km extension up to Parandur, the site for a greenfield airport. In fact, three corridors have been planned with an investment of ₹61,843 crore in Phase II. Corridor 3, which covers the 45.8 km Madhavaram-Siruseri line, Corridor 4, covers the 26.1 km Lighthouse and Poonamallee, and Corridor 5 will run from Madhavaram to Sholinganallur (47.0 km). Corridor 5 to Avadi via Thirumangalam and Mogappair (17 km), Corridor 4 to Parandur (50 km), and Corridor 3 from Siruseri to Kilambakkam Bus Terminus via Kelambakkam (26 km). A consultant will be hired to conduct a feasibility study for these extensions and submit a report with recommendations. The consultant's report will cover a variety of topics such as traffic congestion, peak-hour travel, projected travel demand for these corridors over the next 30 years, estimated construction costs, the need for both public and private funding, social and environmental impacts, and various other factors.
