Blue Line (Namma Metro)

Blue Line
Overview
Other name(s)	ORR East-Airport Metro Line
Owner	Bangalore Metro Rail Corporation Limited (BMRCL)
Locale	Bangalore, Karnataka, India
Termini	Central Silk Board Krishnarajapura / KIAL Terminals
Connecting lines	Operational (1): Purple Line Upcoming (4): Yellow Line Red Line Pink Line Orange Line
Stations	13 (Phase-2A) + 16 (Phase-2B) = 29 03 (Phase-2B) - Future stations
Website	bmrc.co.in
Service
Type	Metro
System	Namma Metro
Depot(s)	Baiyappanahalli, Doddajala
History
Planned opening	Phase 2A - June 2026 (2026-06) Phase 2B - June 2026 (2026-06)
Technical
Line length	58.19 km (36.16 mi)
Number of tracks	2
Character	Elevated, At Grade, Underground
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	750 V DC third rail
Blue Line Map (TBC) Yellow Line towards RV Road Central Silk Board Yellow Line Under construction HSR Layout Red Line towards Hebbala Agara Red Line Proposed Ibbaluru Red Line Proposed Red Line towards Sarjapura Bellandur Kadubeesanahalli Kodibeesanahalli Marathahalli ISRO Indian Railways Towards Hosur and Banaswadi or Baiyyappanahalli Doddanekundi Bagmane Developers - DRDO Sports Complex Sarasvathi Nagara Krishnarajapura Purple Line Indian Railways Towards Krishnarajapuram and Yelahanka Jn or Bengaluru Cantt. Baiyappanahalli Depot (U/C) Kasturi Nagar Horamavu HRBR Layout Kalyan Nagar HBR Layout Nagawara Pink Line Under construction Veerannapalya Kempapura Orange Line Red Line towards Sarjapura Orange Line to JP Nagar 4th Phase Hebbala Red Line Planned Kodigehalli Jakkur Cross Jakkur Plantation (no scope) Indian Railways Towards KSR Bengaluru and Yelahanka Jn Yelahanka Bagalur Cross Bettahalasuru (no scope) Chikkajala (future) Doddajala Indian Railways Towards Kolar and Yelahanka Jn Doddajala Depot (U/C) (at-grade) Airport City KIAL Terminals

The Blue Line or ORR-Airport Metro Line is part of the Namma Metro rail network for the city of Bangalore, Karnataka, India. It consists of two sections - Phase-2A (Central Silk Board to Krishnarajapura) and Phase-2B (Krishnarajapura to Airport). Construction of Phase-2A began in August 2021. Construction of Phase-2B began in February 2022. The 58.19 km line connects Central Silk Board with the Kempegowda International Airport. The Line is mostly elevated but also has an at-grade (surface) section close to the Airport and 2 short underground sections where it passes the Jakkur Aerodrome and Yelahanka AFB. There are 30 stations on the line of which the two station/s at the Airport may be at surface level or underground. Blue Line will have interchanges with the Yellow Line at Central Silk Board, Purple Line at KR Pura, Pink Line at Nagawara and with the future /proposed Orange Line at Hebbal.

In June 2022, BMRCL launched the first ever U Girder span on ORR-Airport metro line. The extension of the Purple Line and construction of the Pink and Yellow Lines is currently in progress. The Pink, Yellow and Blue lines will be CBTC-signaling enabled, unlike Namma Metro's first two lines (Purple and Green lines use distance-signaling). In June 2023, the Deputy Chief Minister of Karnataka D. K. Shivakumar informed that Metro line to Kempegowda International Airport will be completed by June 2026, plus or minus 3 months.

History

The routes under Phase-2A and Phase-2B (Blue Line) were actually part of Phase-3 but 'fast-tracked' and prioritized under Phase-2. As early as in February 2012, the Central government had also requested BMRC to start work on the airport link during Phase 2 itself.

The route from Central Silkboard to K R Puram along the eastern part of Outer Ring Road (ORR) was included as Phase-2A since development on that part of ORR had leap-frogged much ahead of the rest of the city with huge number of new office buildings. As a result, traffic increased several fold with employees traveling from different parts of the city to this new CBD. Chief Minister of Karnataka, Siddaramaiah announced in September 2016 that a new 18 km (11 mi) line connecting Central Silk Board with K.R.Puram along ORR would be included in Phase 2 as Phase-2A of the project at an estimated cost of ₹4202 crores.

Kempegowda International Airport (opened during May 2008) being very far from city center (about 35 km), commuting time by road in traffic congestion is time-consuming. Hence, attention for building a fast mass transit was in the minds of planners from the very beginning, especially since air traffic had kept increasing. The old airport in Bengaluru, the HAL Airport, located well within the city, had closed for commercial operations as part of the terms of the PPP for the new airport.

To connect airport to city, there had initially been a proposal to build a 33 km (21 mi) high speed rail line from MG Road to Kempegowda International Airport (KIA). Cost was estimated at ₹5,767 crore (US$810 million). This was to be executed by an independent SPV - Bangalore Airport Rail Link Limited (BARLL). However, the plan for an exclusive city-airport high speed rail was canceled during October 2013 due to high cost and viability concerns.

It was decided that BMRC would manage the airport rail project and a regular metro line with fewer halts would be built instead of a high speed rail. Following this, suggestions were invited from public during September 2016 to choose any one of nine possible extension routes from existing and proposed metro lines to the airport. The proposed extension routes had an average length of 30 km (19 mi), and cost estimates ranged between ₹4,500 crore and ₹7,000 crore. A 25.9 km (16.1 mi) extension from Nagawara via Kannur and Bagaluru was the shortest, while the 35.4 km (22.0 mi) extension from Yeshwanthpur via Yelahanka, Kannur and Bagaluru was the longest of the proposed routes. BMRC received 1,300 responses from the public. The shortest (25.9 km, 16.1 mi) extension of the Kalena Agrahara (previously Gottigere) – Nagawara line via Kannur and Bagaluru to the airport emerged as the most popular choice. In February 2017, the Centre requested BMRC to start work on the airport link before Phase 3. Thus, the Airport Line was included in Phase 2 as Phase 2B.

Since the airport's managing company, Bengaluru International Airport Limited (BIAL) forbade underground construction from the southern side of the airport (due to security concerns as it would have to pass beneath the airport's second runway), the shortest route options (i.e. extending the Pink line from Nagawara directly north) were eliminated. An alternate route proceeding north till RK Hegde Nagar and then turning west to Jakkur and then along Airport Road was explored. Bangalore Development Minister K. J. George announced on 12 May 2017 that the government had finalized the Nagawara—Ramakrishna Hegde Nagar—Jakkur—Yelahanka route to the airport. However, this route had an obstacle as a high-pressure petroleum pipeline was passing through the originally proposed route.

This was changed and on 10 January 2019, the State Cabinet approved a change in alignment for the proposed metro line to the airport. The new line would begin at Krishnarajapura (K.R. Puram) and be aligned along the northern part of ORR (Outer Ring road), passing Kasturinagar, Nagawara, Hebbal, and Jakkur before heading towards the airport. The line would be 38 km long, about 9 km longer than the route previously proposed, estimated to cost ₹10,584 crore (US$1.5 billion).

Tendering

Blue Line
Tendering	Section	Length	Successful Bid /Cost	Contractor	Award
Detailed Design Consultant	Central Silk Board - HBR Layout	26.633 km (16.549 mi)	₹8.30 crore (US$970,000)	SMEC International	07 Feb 2020
	HBR Layout - KIAL Airport	30.692 km (19.071 mi)	₹6.26 crore (US$730,000)	AECOM – CEG JV	12 Feb 2020
Pre Construction Work	KR Pura - KIAL Airport	37.692 km (23.421 mi)	₹9.27 crore (US$1.1 million)	Various	19 Dec 2020
Package 2A/P1/60(a)	Central Silk Board - Kodibeesanahalli	9.859 km (6.126 mi)	₹785.25 crore (US$92 million)	Afcons	25 May 2021
Package 2A/P2/60(b)	Kodibeesanahalli - KR Pura	9.774 km (6.073 mi)	₹623.55 crore (US$73 million)	Shankaranarayana	25 May 2021
Package 2B/P2/69(a)	KR Pura - Kempapura	11.003 km (6.837 mi)	₹739.04 crore (US$86 million)	NCC	17 Nov 2021
Package 2B/P2/69(b)	Kempapura - Bagalur Cross	11.678 km (7.256 mi)	₹747.99 crore (US$88 million)	NCC	17 Nov 2021
Package 2B/P2/69(c)	Bagalur Cross - KIAL Terminals	15.011 km (9.327 mi)	₹680.21 crore (US$80 million)	NCC	17 Nov 2021
Project Management Consultant			₹20.58 crore (US$2.4 million)	RITES	17 Dec 2021
Remodelling Baiyappanahalli Depot			₹249.19 crore (US$29 million)	J Kumar – AICPL JV	18 Mar 2023
Airport Depot			₹182.39 crore (US$21 million)	J Kumar – AICPL JV	18 Mar 2023
Ballastless Track Work			₹500.94 crore (US$59 million)	Larsen & Toubro	02 Jun 2023
Rolling Stock (222 Coaches)			₹2,217.78 crore (US$260 million)	BEML	08 Aug 2023
Track Turnout			₹29.98 crore (US$3.5 million)	Vossloh	22 Mar 2024
Engineering, Supply, Erection, Testing and Commissioning of Power Supply			₹248.61 crore (US$29 million)	KEC International	10 Jun 2024
750V DC Third Rail electrification			₹764.64 crore (US$89 million)	Siemens – RVNL JV	11 Jun 2024
Signalling System (CBTC) & PSD			₹626.8 crore (US$73 million)	Alstom	12 Jun 2024
Electrical & Mechanical			Bids Under Evaluation
Total		58.19 km (36.16 mi)	₹8,440.79 crore (US$990 million)

Phase-2A

BMRCL prepared the detailed project report for the proposed Central Silk Board - KR Puram Line and submitted the DPR to the state government on 28 October 2016. Phase 2A was approved by the State Cabinet on 1 March 2017.

Tenders for the ORR (East) Metro line were called in February 2018 and IL&FS emerged the lowest bidder for all packages. However, the tenders were quashed due to cash flow problems and bankruptcy proceedings by the selected firm, IL&FS. A second round of tendering was done in December 2019. The project cost was revised to ₹5994 crores. Fresh bids were received by multiple firms in March 2020. There are two packages. The first package included 2.84 km of ramps for a flyover at Central Silk board junction in addition to 9.859 km of viaduct with six elevated stations. The second package was for 8.377 km viaduct with seven elevated stations, 1.097 km depot line and a 0.30 km pocket track.

Central government's approval was much delayed and finally received in April-2021. Tenders were awarded in May-2021 and construction on Phase-2A finally began in August-2021. Opening of this phase as per August 2022 from MD of BMRCL is expected around December 2024.

Phase-2B

Installation of U-Girders (Hebbala - KIAL Terminals stretch) under Blue Line of Namma Metro as of October 2024

DPR for the Airport Line had been prepared in September 2017 and cleared by Government of Karnataka in January 2019.

Tenders for the Airport line were called in July 2020. There are three packages. The first package was for 11.003 km viaduct, including 281 mtrs viaduct beyond Phase-2A with eight elevated stations and 650 mtrs link line to Baiyyappanahalli depot. The second package was for 11.678 km viaduct with 250 mtrs pocket track and two elevated stations. The third package was for 15.011 km viaduct, including 718.18 mtrs cut and cover portion in front of Yelahanka Air Force Station. All three packages include road widening, utility diversion and allied works.

Bettadahalasuru station would be built by Embassy group at a cost of ₹140 crore. Kempegowda International Airport is likely to fund the construction of two airport stations off the highway. An MoU was signed between BMRC and KIAL for construction of the 4.95 km line and stations entailing an investment of ₹800 crore.

Central government's approval was delayed and finally received in April 2021. Nagarjuna Construction Company (NCC) emerged as the lowest bidder to construct the line on September 16, 2021. Construction finally began in February 2022. Opening of this phase as per August 2022 from MD of BMRCL is expected around December 2025.

In January 2023, there was an accident when an reinforcement cage of the under-construction metro pier fell on a woman software engineer, Tejaswini Sulakhe and her son Vihan in HBR Layout, which led to their eventual death. BMRCL announced a financial assistance of ₹ 20 lakh. Chief Minister Basavaraj Bommai also announced a separate compensation of Rs 10 lakh for each of the deaths from the Chief Ministers’ Relief Fund.

Funding

The Union and State governments will contribute ₹3,973 crore by way of equity and subordinate debt. Land acquisition costs, estimated at ₹2,762 crore, will be funded by the Government of Karnataka. BMRCL will raise the remaining amount of ₹5,960 crores through loans. In March-2021, it had entered into a loan agreement with JICA for US$318 million (₹2,317 crore). BMRC has raised US$500 million (₹3643 crore) from ADB to fund construction of the Blue Line (Phase-2A and 2B).

Thus, financial arrangements have been completed for Phases 2A and 2B. The 58.19-km line is estimated to cost ₹14,788 crores.

On June 10, 2024, Rail Vikas Nigam Ltd. (RVNL) disclosed in a BSE filing that its joint venture with Siemens has secured a contract worth approximately Rs. 762 crore from Bangalore Metro Rail Corporation. This contract encompasses the 750V DC third rail electrification work under package EPC5-CC for the 57 km Blue Line of the Namma Metro.

Stations

The Blue Line will have 29 stations.

Interchanges

Passenger interchange facilities, connecting to other metro and railway lines, will be provided at the following stations:

• Central Silk Board (Connects to the Yellow Line, which runs from Rashtreeya Vidyalaya Road to Bommasandra)
• Agara (Connects to the Red Line, which runs from Hebbala to Sarjapura)
• Ibbaluru (Connects to the Red Line, which runs from Hebbala to Sarjapura)
• Krishnarajapura (Connects to the Purple Line, which runs from Whitefield (Kadugodi) to Challaghatta)
• Nagawara (Connects to the Pink Line, which runs between Nagawara and Kalena Agragara)
• Kempapura (Connects to the Orange Line, which runs from JP Nagar 4th Phase and Kempapura)
• Hebbala (Connects to the Orange Line, which runs from JP Nagar 4th Phase and Kempapura and to the Red Line, which runs from Hebbala to Sarjapura)
• KIAL Terminals (Connects to the Kempegowda International Airport)

Blue Line
Phase-2A
#	Station Name		Expected Opening	Connections	Station Layout	Platform Level Type
	English	Kannada
1	Central Silk Board	ಕೇಂದ್ರ ರೇಷ್ಮೆ ಮಂಡಳಿ	June 2026	Yellow Line (Under Construction)	Elevated	Side
2	HSR Layout	ಎಚ್‌ ಎಸ್‌ ಆರ್ ಬಡಾವಣೆ	June 2026		Elevated	Side
3	Agara	ಅಗರ	June 2026	Red Line (Approved)	Elevated	Side
4	Ibbaluru	ಇಬ್ಬಲೂರು	June 2026	Red Line (Approved)	Elevated	Side
5	Bellanduru	ಬೆಳ್ಳಂದೂರು	June 2026		Elevated	Side
6	Kadubeesanahalli	ಕಾಡುಬೀಸನಹಳ್ಳಿ	June 2026		Elevated	Side
7	Kodibeesanahalli	ಕೋಡಿಬೀಸನಹಳ್ಳಿ	June 2026		Elevated	Side
8	Marathahalli	ಮಾರತಹಳ್ಳಿ	June 2026	• Marathahalli Suburban station (UC)  Kanaka	Elevated	Side
9	ISRO	ಇಸ್ರೋ	June 2026		Elevated	Side
10	Doddanekundi	ದೊಡ್ದನೆಕ್ಕುಂದಿ	June 2026		Elevated	Side
11	DRDO Sports Complex	ರ.ಸಂ.ಅ.ಸಂ. ಕ್ರೀಡಾ ಸಂಕೀರ್ಣ	June 2026		Elevated	Side
12	Saraswathi Nagar	ಸರಸ್ವತಿ ನಗರ	June 2026		Elevated	Side
13	Krishnarajapura	ಕೃಷ್ಣರಾಜಪುರ	June 2026	Purple Line Krishnarajapuram •KR Pura Suburban station(UC) Mallige	Elevated	Side
Phase-2B
14	Kasturi Nagar	ಕಸ್ತೂರಿ ನಗರ	December 2026		Elevated	Side
15	Horamavu	ಹೊರಮಾವು	December 2026		Elevated	Side
16	HRBR Layout	ಎಚ್‌ ಆರ್‌ ಬಿ ಆರ್ ಬಡಾವಣೆ	December 2026		Elevated	Side
17	Kalyan Nagar	ಕಲ್ಯಾಣ ನಗರ	December 2026		Elevated	Side
18	HBR Layout	ಎಚ್‌ ಬಿ ಆರ್ ಬಡಾವಣೆ	December 2026		Elevated	Side
19	Nagawara	ನಾಗವಾರ	December 2026	Pink Line (Under Construction)	Elevated	Side & Island
20	Veerannapalya	ವೀರಣ್ಣಪಾಳ್ಯ	December 2026		Elevated	Side
21	Kempapura	ಕೆಂಪಾಪುರ	December 2026	Orange Line (Approved)	Elevated	Side
22	Hebbala	ಹೆಬ್ಬಾಳ	September 2026	Hebbal suburban railway station(UC) Mallige  Hebbal TTMC (Planned) Orange Line (Approved); Red Line (Approved)	Elevated	Side
23	Kodigehalli	ಕೊಡಿಗೇಹಳ್ಳಿ	September 2026		Elevated	Island
24	Jakkur Cross	ಜಕ್ಕೂರು ಅಡ್ಡ	September 2026		Elevated	Island
25	Yelahanka	ಯಲಹಂಕ	September 2026		Elevated	Island
26	Bagalur Cross	ಬಾಗಲೂರು ಅಡ್ಡ	September 2026		Elevated	Island
27	Doddajala	ದೊಡ್ಡಜಾಲ	September 2026	•Doddajala Suburban station (UC)  Parijata		Elevated	Side
28	Airport City	ವಿಮಾನ ನಿಲ್ದಾಣ ನಗರ	September 2026	Airport City (Proposed)	At-Grade	Side
29	KIAL Terminals	ಕ ಅಂ ವಿ ನಿ ನಿಲ್ದಾಣ	September 2026	Kempegowda International Airport	Underground	Island

See also

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