Twin tunnels to operate driverless metro trains from Venugopal Nagar to Kellys section are likely to be ready by December, 2026. The 18-km stretch, constructed by Tata Projects, is part of the 45.4 km Madhavaram Milk Colony Siruseri Sipcot Corridor-3 of the 116.1 km phase-II of Chennai Metro Rail.

A 7.5 km tunnel was completed and seven tunnel boring machines are at work between Venugopal Nagar and Kellys. In terms of progress, more than 60 percent of work including diaphragm walls of three stations is completed and work on the fourth is nearing completion. six months to complete other work and the project.

The stretch where tunnels have been built includes Venugopal Nagar to Madhavaram Milk Colony, Madhavaram Milk Colony to Madhavaram High Road, Aynavaram to Otteri and Aynavaram to Perambur. While TBMs are being operated between Madhavaram High Road and Moolakadai, tunnelling from Purasaiwalkam shopping hub to Kellys will begin in two weeks.