The Phase – I of Chennai Metro Rail project covers a length of 45.046 km network and consists of two Corridors i.e. Corridor-I – From Washermenpet to Airport (23.085 Km), Corridor -2 – From Chennai Central to St. Thomas Mount (21.961 km). About 55% of the Corridors in Phase –I is Underground and the remaining are Elevated. Out of 32 nos of Stations 13 nos are Elevated Stations and remaining 19 nos are Underground Stations. Inter Corridor interchange Stations are available in Alandur (Elevated) and Chennai Central (Underground) respectively.
The Phase I was commissioned in stage wise. The first segment of section between Alandur to Koyambedu was commissioned on 29th June, 2015. The first Underground line between Thirumangalam Metro Station to Nehru Park Metro Station was inaugurated on 14th May, 2017. The Underground stretches – Nehru Park Metro Station to Chennai Central Metro Station and Saidapet Metro Station to AG-DMS metro Station were opened a year later on 25th May, 2018. On 10th February, 2019, the Underground stretch from AG-DMS to Washermenpet of blue line was opened, completing 45 km network under the Phase I of the Metro Rail Project.
PHASE I – EXTENSION
Phase I Extension covers a length of 9.05 Km from Washermenpet to Wimco Nagar. It consists of 9 nos. of Stations and Elevated depot. Out of 9 nos. of Metro Stations, 7 nos. are Elevated Stations and the remaining 2 nos. are Underground Stations and the same was commissioned on 14th February 2021 from Washermenpet to Wimco Nagar except Thiruvottriyur Theradi Metro Station & Wimco Nagar Depot Station. The remaining 2 nos of station was commissioned on 13th March 2022.
Phase II expansion has been planned for a length of 118.9 Km network with 128 nos. of Stations. It consists of three Corridors i.e. Corridor -3 – From Madhavaram to SIPCOT (45.8 Km), Corridor -4 – From Lighthouse to Poonamalle Bypass (26.1 Km), Corridor-5- From Madhavaram to Sholinganallur (47 Km). The estimated cost of the project is ₹63246 Cr (Rupees Sixty three thousand two hundred and forty six only) including IDC. This proposal is under the process and approval of Government of India. The project is proposed to be completed by the end of 2026.
The soil testing has been fully completed and Detailed Design work is in the advanced stage of completion. Based on the Administrative sanction issued by the State Government, the tenders for construction of an Underground tunnel & Elevated stretch in Corridor 3, Elevated and Underground stretch, Depot & Track work in Corridor 4, Elevated stretch in Corridor 5 have already been awarded and work is in progress