The Chennai Mass Rapid Transit System, commonly referred to as Chennai MRTS, is a metropolitan rail transit system in Chennai, India. It is operated by Southern Railway of the state-owned Indian Railways. Opened in 1995, it was the first elevated railway line in India. The railway line runs from Chennai Beach to St. Thomas Mount, covering a distance of 23.98 km (14.90 mi) with 21 stations and is integrated with the wider Chennai suburban railway network.