Chennai Metro Phase II has commenced passenger services on its first operational section using advanced Communication-Based Train Control (CBTC) signalling technology from Hitachi Rail. The approximately 15-km Poonamallee–Vadapalani corridor, which opened on October 11, 2026, features 11 elevated stations and marks a major milestone in Chennai’s urban transport expansion.
The signalling system is designed to support Grade of Automation 4 (GoA4), the highest level of metro automation, enabling driverless train operations. It automatically controls train traction and braking, calculates optimal operating speeds and helps maintain safe distances between trains.
Technology for Faster and More Efficient Metro Services
When integrated with Automatic Train Operation (ATO), the CBTC system is designed to support train intervals of up to 90 seconds. The technology aims to improve passenger safety, increase network capacity, enhance service reliability and reduce maintenance requirements.
The newly operational corridor also includes a 3.7-km double-decker structure, combining metro infrastructure with road connectivity.
₹1,620 Crore Signalling Contract
Hitachi Rail was awarded a ₹1,620 crore contract in 2023 to design, manufacture, supply, install, test and commission signalling, train control and video management systems for Chennai Metro Phase II.
The project covers approximately 119 km of metro lines and forms a key part of the city’s broader metro expansion programme. The technology is expected to support improved connectivity between Chennai’s western suburbs and the city centre while promoting more sustainable urban mobility.
The entry of CBTC technology into passenger service marks an important step in Chennai Metro’s transition towards highly automated operations, with the wider Phase II network expected to strengthen the city’s public transport capacity.
