Chennai Metro Yellow Line starts passenger service: 11 stations from Poonamallee Bypass to Vadapalani

Chennai Metro’s Yellow Line Phase 2 Corridor 4 Stage 1A is now open to passengers. Chennai Metro Rail Limited (CMRL) began regular service on October 11, 2026, on the approximately 15-km section between Poonamallee Bypass and Vadapalani.

Stations covered

The new section has 11 elevated stations: Poonamallee Bypass, Poonamallee Bus Stand, Poonamallee Government Hospital, Karayanchavadi, Kumananchavadi, Kattupakkam, Iyappanthangal, Thelliyaragaram, Porur Bypass, Porur Junction and Vadapalani.

The opening gives commuters in west Chennai a direct metro option towards Vadapalani and the existing network. The section is part of the larger Phase 2 programme, so this opening should be understood as a staged launch rather than the completion of the full corridor.

Timings and frequency

From October 12, regular trains have been scheduled in both directions from 7:00 am to 9:00 pm. From Monday to Saturday, peak-hour trains run every 10 minutes between 8:00 am and 11:00 am and between 5:00 pm and 8:00 pm. During other operating hours, the planned interval is 15 minutes.

On Sundays and holidays, the service is planned at a 15-minute interval from 7:00 am to 9:00 pm. The last train leaves both Poonamallee Bypass and the Corridor 4 Vadapalani terminal at 9:00 pm.

What commuters should check

Passengers should allow extra time while they learn the new interchange pattern and confirm the station entrance that best serves their destination. The service timetable is an operating plan and may change during maintenance, special events or safety work, so commuters should check the latest CMRL notice before making a late-night journey.

The first operational days are also a useful test of last-mile connections. Bus, auto-rickshaw, walking and parking conditions around the new stations may settle gradually as passenger demand becomes clearer.

CMRL’s official release dated October 10, 2026 is the source for the station list, timings and frequency published in this report.