Green Line (Namma Metro)

The Green Line is a line on the Namma Metro rail system. As of 2021, the line is long and connects Madavara in the northwest to Silk Institute in the south. The line connects the north western suburbs and neighbourhoods of Bengaluru, such as Madavara, Jalahalli, Peenya, Yeshwanthpur, Rajajinagar and Malleshwaram along Tumkur Road with the central hub of Majestic and the southern residential areas of Bangalore such as Basavanagudi, Jayanagara, Banashankari, Konanakunte and Thalaghattapura along Kanakapura Road. The Green Line is mostly elevated, with 26 elevated and 3 underground stations. There is an interchange with the Purple Line at Majestic station.

History

Green Line sections were opened as indicated below.

Phase I

Construction work on Reach 3 and 3A of Phase I of the Namma Metro began in 2009–10. The total cost of the project on this stretch was 2,100 crore. Work on the underground section commenced in May 2011. Tunnel boring machines named ''Kaveri,'' ''Krishna'' and ''Godavari'' were used for tunnel boring work for the Green Line. The first trial run on the Green Line was conducted on 8 August 2013.

Construction required 1.3 lakh tonnes of concrete, of steel bars, and of high tension wires weighing . A total of 395 piers, including station piers and portals, were constructed on the stretch. The tallest pier of the viaduct is a pier between Mahakavi Kuvempu Road and Srirampura stations, opposite Gayatri Devi Park. There 353 spans on the stretch, the longest being the curved span over the railway track off Srirampura. The total roofing area of the 10 stations on the stretch was .

The first section of Green Line was opened to public on 1 March 2014. BMRCL Managing Director Pradeep Singh Kharola stated that about 25,000 passengers traveled on the line on the opening day. In the first month of operations, 7.62 lakh people at an average of 24,605 people daily used the Green Line, generating a revenue of .

TBM ''Godavari'' began drilling the underground section between Sampige Road and Majestic stations in April 2014. ''Godavari'' broke down a few months later, and needed to have its cutter head replaced, due to contact with tough terrain including hard rock and boulders. The machine restarted work in September 2015 after importing the cutter head from Italy. ''Godavari'' completed drilling and emerged on the Majestic station end of the tunnel on 19 April 2016. Meanwhile, ''Kaveri'' and ''Krishna'' drilled the underground section between National College and Nadaprabhu Kempegowda station.

Construction of the underground section of Green Line required the use of 3,000 transit mixer loads of concrete. of cable had to be laid.

Trial runs on the elevated section between National College and Yelachenahalli began on 23 November 2016. Trials were conducted between National College and Jayanagara initially at a speed of , and then along the entire elevated section between National College and Yelachenahalli at a speed of . Trial runs began in the tunneled section on 30 March 2017.

Services at Sampige Road, Srirampura and Kuvempu Road stations were suspended between 13 and 22 March 2017 to allow authorities to conduct static and other tests and to link Sampige Road station with Nadaprabhu Kempegowda station. During the 10-day testing period, services operated only between Nagasandra and Rajajinagar stations. The BMTC introduced rail replacement bus services from Rajajinagara to Hosahalli. Services between Sampige Road and Rajajinagara were suspended again for four days beginning 13 April 2017 to conduct trial runs on the underground section between Sampige Road and National College. Trial runs were completed on 16 May 2017.

Phase II

Contract for construction of the 6.5 km Reach 4B from Yelachenahalli to Silk Institute was awarded to Nagarjuna Construction Co. The extension was estimated to cost . Civil work on the extension began in October 2016 and was completed by 2020. Trial runs were conducted on 18–19 December 2020, and the extension was opened on 14 January 2021, making it the first section of Phase II to start commercial operations.

In October 2016, BMRCL invited bids for the construction of viaduct and stations on the 3.031 km extension (Reach 3C) of the Green Line from Nagasandra to Madavara (previously named Bengaluru International Exhibition Centre). Reach 3C was awarded to Simplex Infrastructure Limited in late February 2017. The contract specified a cost of and a deadline for completion of 27 months. The start of construction on the extension was delayed by 4 months due to land acquisition issues concerning land near Jindal Aluminium Limited in Kirloskar Layout. The issues were resolved and construction began in June 2017. Trial runs were conducted in August 2024 and it was opened on 7 November 2024.

After Phase II was completed, the line extended its stretch from Madavara in northwest to Silk Institute in the South. The length of the line increased to . Commercial operations on the Nagasandra-Madavara stretch started from November 7, 2024.

There have been petitions to extend the line further south till the Art of Living International Centre in the outskirts of Bengaluru.

Stations

There are 32 stations on the Green Line. Each station has around 60 surveillance cameras. Passenger lifts and escalators are provided at all stations. The Line has an operational depot at Peenya and another under construction at Silk Institute

List of stations

Infrastructure

Rolling stock

BMRC procured 150 metro coaches for fifty 3-car train sets for Phase l of Namma Metro from BEML-Hyundai Rotem at a cost of Rs 1,672.50 crore (Rs 16.72 billion). Coaches were 20.8 metres (68 ft) long, 2.88 metres (9.4 ft) wide and 3.8 metres (12 ft) high. Each coach has a seating capacity of about 50 and standing capacity of approximately 306, making each train have a capacity of about 1000. Traction was through four 180 kW motors in each motor coach. The trains have a maximum speed of 80 km/h, axle load of 15 tonnes, and operate on 750 volt direct current with third rail power collection. The coaches are made of stainless steel and are fully air-conditioned, and contain longitudinal banks of seats, wide vestibules between coaches, non-skid and non-slip floor surfaces, four wide passenger access doors on each side, an automatic voice announcement system and electronic information and destination displays.

Initial operations on the Green Line began with twenty-one 3-coach trains. As loads increased with increasing ridership, all trains were converted to six coaches. Rolling stock on the Green Line are silver with a streak of bright green along its length.

Power

Power is supplied to the Green Line from the Peenya sub-station of the Karnataka Power Transmission Corporation Ltd. (KPTCL).

Signaling

In September 2009, a consortium led by Alstom Project India Limited was awarded a contract worth ₹563.4 crore (US$66.6 million) to supply control and signalling system for the first phase of the project. The consortium is led by Alstom and composed of Alstom Transport SA, Thales Group Portugal S A and Sumitomo Corporation. Alstom will provide the design, manufacture, supply, installing, testing and commissioning of the train control and signalling system and Thales will provide the design, installing, testing and commissioning of the telecommunication system for Phase I of the metro system. It includes the Urbalis 200 Automatic Train Control system which will ensure optimal safety, flexible operations and heightened passenger comfort.

The integrated control centre at Baiyyappanahalli has direct communication with trains and stations, which are fitted with CCTV with visual and audio service information.

Operations

Frequency and capacity

Trains initially operated on the Green Line from 6 am to 11 pm. This was extended from 5 am to 11 pm from 1 December 2015. The frequency along the line was 15 minutes from 5 am to 8 am and 8 pm to 11 pm, and 10 minutes between 8 am and 8 pm. Trains halt for 30 seconds at each station. Each six-coach train has a capacity of 2,004 passengers.

Fire Department.

Namma Metro has a dedicated fire team to take care of operations and maintenance of the firefighting system installed in metro stations. They conduct regular mock exercises and liaison with the state fire department for any assistance in case of a fire emergency.

See also

*Namma Metro
** Purple Line
** Yellow Line
** Pink Line
** Blue Line
** Orange Line
** Red Line
* List of Namma Metro Stations
* Rapid transit in India
* List of metro systems

References

External links

Bangalore Metro Rail Corporation Ltd. (Official site)

{{Namma Metro, green line=yes

Namma Metro lines
Railway lines opened in 2014
2014 establishments in Karnataka
Japan International Cooperation Agency