• 1983-84: Work on first phase from Chennai Beach to Thirumayilai for a length of 8.55 km. is taken up through Railways Ministry.
  • November 16, 1995: Services from Chennai Beach to Chepauk inaugurated by Chief Minister Jayalalithaa
  • October 19, 1997: Stretch extended to Thirumayilai
  • 1997-98: Work on Phase-II from Thirumayilai to Velachery commences
  • January 26, 2004: First train stops at Thiruvanmiyur
  • November 19, 2007: Extension of services to Velachery launched by then Chief Minister M. Karunanidhi
  • April, 2008: Work on MRTS Phase II Extension from Velachery to St. Thomas Mount starts