The Chennai Division of Southern Railway has replaced 16 level crossings with subways since April 2025, including five completed during the first six months of the current financial year. The railway said 11 of the subways were commissioned during 2025-26. Each project has an estimated cost of about Rs. 80 mn.

Most of the completed works are located on the Arakkonam–Jolarpettai section. Subways have been commissioned at crossings between Sevur and Katpadi, Latteri and Kavanur, Gudiyattam and Valathoor, and Jolarpettai and Somanayakkanpatti, among other locations.

Five additional crossings were eliminated during the current financial year. These are located between Chitteri and Mahendravadi, Katpadi and Latteri, Arambakkam and Tada, Elavur and Arambakkam, and Kadambattur and Thiruvalangadu.

The programme also covers LC 11A between Washermanpet and Korukkupet on the MGR Chennai Central–Gudur section and LC 109 between Perani and Vikravandi on the Chennai Egmore–Villupuram section. Three more subways are under construction at LC 57 in the Latteri railway station yard, LC 20 between Tiruvallur and Kadambattur, and LC 28 between Tiruvallangadu and Arakkonam. All three are scheduled for completion by January 31, 2027, at an estimated cost of about Rs. 80 mn each.