Chennai: Chief Minister Edapaddi Palaniswami and Union minister for Urban Development Venkaiah Naidu flagged off a train and inaugurated the 8km underground line between Thirumangalam and Nehru Park on Sunday.
Passenger services will begin 2pm onwards. A few free services were run between Thirumangalam and Nehru Park.
The underground line has seven stations, which are in turn linked to the elevated corridors through a ramp between Thirumangalam and Koyambedu.
Many commuters waited for several hours to take a joy ride. The second train from Thirumangalam station began its journey in the midst of applause and cheers from passengers.