Chennai Metro Phase II: Poonamallee to Vadapalani stretch with a double-decker viaduct
The Poonamallee to Vadapalani stretch of Chennai Metro Phase II opened on 11 October 2026. Its key structure is a double-decker viaduct close to 4 km long: single piers carry two decks, this line uses the lower deck and the upper deck is reserved for another Phase II corridor. Four stations on the stretch are built at two levels with a shared concourse.
Metro
Official sources
- Press Information Bureau, 10 Oct 2026, release 2321671
- Chennai Metro Rail Ltd, construction technology page
Summary written by Indiacon in our own words from the official sources above. Found an error? Write to indiacongroupofengineers [at] gmail [dot] com.