Chennai Metro Green Line

The Green Line (Corridor 2) connects Chennai Central to St. Thomas Mount, 22 km across 17 stations, through Egmore, Kilpauk, Anna Nagar, Koyambedu and Vadapalani. The eastern half from Central to Thirumangalam is underground; the rest is elevated. This is the line for Egmore railway station, Anna Nagar's residential blocks, Koyambedu's CMBT bus terminus and the Koyambedu market, and Vadapalani's temple, studios and malls. It opened in stages between 2015 and 2018. Interchanges on the Green Line Change to the Blue Line at Chennai Central or Arignar Anna Alandur. Since 11 October 2026, Vadapalani is the interchange with the new Yellow Line towards Porur and Poonamallee. St. Thomas Mount will also connect to suburban rail and the future Corridor 5. Timings and frequency Trains run from about 5:00 AM to 11:00 PM. The Green Line's own trains run every 12 minutes in peak and 14 minutes off-peak — but the Central–Alandur stretch also carries inter-corridor trains, so the effective frequency there is 6–7 minutes. Data from CMRL official sources; timetable dated 23.10.2026.