The Chennai Metro Rail Limited (CMRL) has commenced test and trial runs on a 3 km stretch from Mulaithottam to Poonamallee under the Chennai metro project phase II on March 20, 2025. For the undergoing trials, Poonamalle depot is likely to serve as the centre for coordinating the processes.
The project involves development of 118.9 km of three metro corridors (corridor III, IV and V) in Chennai, Tamil Nadu at an estimated cost of Rs 632.46 billion. It is mostly underground with an elevated section confined to a few short stretches and consists of 128 stations in total.