Prime Minister Narendra Modi and Tamil Nadu Chief Minister C. Joseph Vijay on Sunday, 11 October 2026, jointly flagged off the first operational stretch of Corridor 4 under Chennai Metro Phase II, marking a significant leap in the city's public transport expansion. Both leaders also rode the newly inaugurated stretch, built at a cost of ₹4,900 crore, underscoring the project's political and civic significance.

What the New Stretch Covers

The inaugurated section forms part of a wider Phase II network and includes a 3.5 km double-decker viaduct — a structurally complex piece of urban infrastructure cutting through one of Chennai's most congested road corridors. The stretch connects suburban zones including Poonamallee and Avadi to established city nodes such as Vadapalani, directly addressing long-standing commuter grievances in the city's western and north-western periphery.

Why It Matters for Chennai Commuters

Chennai has struggled with chronic traffic congestion, particularly along arterial corridors connecting suburban areas to commercial and educational hubs. The new metro link is expected to offer daily relief to students, working professionals, and other regular commuters who have endured severe gridlock on these routes. Notably, the Poonamallee–Vadapalani corridor has been among the city's most complained-about stretches for over a decade.

This is also the first metro connectivity for residents of areas like Avadi, which falls within the Chennai metropolitan region but had remained unserved by rapid transit infrastructure until now.

Residents and Passengers React

Commuters at the inauguration expressed visible relief and enthusiasm. A passenger from the Poonamallee area said the launch was 'a very happy moment,' noting that students travelling to Vadapalani and working professionals had long been 'facing severe traffic congestion.' The passenger added that the new service would allow people to 'reach their schools, colleges, and workplaces more quickly and conveniently.'

Another commuter, Sridharan, who is from Avadi, said residents of his area had 'been waiting for this service for a long time,' calling its arrival 'great joy.' He said the metro would help passengers 'save travel time, avoid traffic congestion, and enjoy a more comfortable journey.'

Engineering Scale and Project Background

The ₹4,900 crore investment reflects the engineering complexity of the corridor, particularly the 3.5 km double-decker viaduct — a design solution necessitated by limited ground-level space in a densely built urban zone. Chennai Metro Phase II is among the largest ongoing urban rail projects in South India, with multiple corridors planned to extend the network well beyond the Phase I footprint.

What Comes Next

The flagging-off of Corridor 4's first stretch is expected to be followed by the progressive rollout of additional Phase II sections. The full build-out of the Phase II network is anticipated to significantly reshape commute patterns across Chennai's rapidly expanding metropolitan area, with further corridors still under various stages of planning and construction.