Green Line (Chennai Metro)

Green Line
Green Line
	A metro train on the Green line entering Koyambedu station
Overview
Status	Fully Operational
Locale	Chennai
Termini	Chennai Central; St. Thomas Mount;
Connecting lines	Operational (5):; Blue Line Chennai MRTS , Chennai Suburban West Line , Chennai Suburban South Line , Chennai Suburban South West Line ; Upcoming (3):; Purple Line Red Line Yellow Line
Stations	17
Service
Type	Rapid transit
System	Chennai Metro
Operator(s)	Chennai Metro Rail Limited
Depot(s)	Koyambedu
Rolling stock	Alstom
History
Opened	25 September 2015
Technical
Line length	22 km (14 mi)
Number of tracks	2
Character	9.7 km (6.0 mi) Underground ; 12.3 km (7.6 mi) Elevated
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	25 kV 50 Hz AC overhead catenary
Operating speed	80 km/h (50 mph)
Route map
Route map
	Chennai Suburban Railway
	South Line & South West Line
	Blue Line
	MRTS
	Chennai Suburban Railway
	South Line & South West Line
	Blue Line
	Red Line
	Chennai Suburban Railway
	South Line & South West Line

The Green Line is one of the two operational lines of Chennai Metro apart from the Blue line in the city of Chennai. The line stretches from Chennai Central to St. Thomas Mount, covering a distance of 22 km (14 mi). The line consists of 17 stations out of which nine stations are underground and the rest are elevated or on ground level.

Planning for the metro started in 2007-08 with the construction commencing in February 2009. Testing began in 2014, and the Commissioner of Metro Rail Safety approved the operations in January 2015. On 29 June 2015, commercial operations started between Alandur and Koyambedu stations on the green line with the first underground section between Thirumangalam to Nehru Park operational on 14 May 2017, which was later extended to Chennai Central on 25 May 2018.