This is part of CMRl’s 118.9 km phase II project with three corridors corridor 3 (Madhavaram to SIPCOT), corridor 4 (Poonamallee to Light House) and corridor 5 (Madhavaram to Sholinganallur)

https://www.thehindubusinessline.com/economy/logistics/chennai-metro-rail-limited-conducts-trial-run-up-to-vadapalani/article70497571.ece