Tamil Nadu gave in-principle approval for two Chennai Metro Phase-II extension DPRs

Tamil Nadu accorded in-principle approval for two Chennai Metro Phase-II extension corridors—Corridor-4 extension from Poonamallee Bypass to Sunguvarchatram via Sriperumbudur, and a link from Koyambedu to Pattabiram up to the Outer Ring Road via Ambattur and Avadi—and recommended them to the Government of India for approval, according to the Special Initiatives Department Policy Note 2026-27.