Yellow Line (Namma Metro)

In the late 2000s and early 2010s, traffic began to grow in the Outer Ring Road in Bangalore and there was a lack of connection from the northern suburbs of Bangalore to the southeastern industrial zones. In 2009, BMRCL planned to build a line in the southern end of the city to connect it to the industrial areas of Bommasandra and Electronic City. In 2012, BMRCL submitted the Phase 2 of Namma Metro which included a 72.095 km (44.798 mi) metro expansion of the existing metro lines and the construction of two new lines from Bannerghatta Road to Nagawara and from RV Road to Bommasandra.^[12] The lines were later named the Yellow Line and Pink Line, and BMRCL explored the option of developing them as a public-private partnership project, but these plans were later abandoned.^[13] The project received approval from the Central Government in January 2014.^[14]

For Phase 2 of the Namma Metro, the Central and State Governments will fund around ₹15,000 crore. The State and Central Governments will bear 30% and 20% of the project cost respectively. The remaining will be obtained through senior term loans. BMRCL is permitted to raise up to ₹9,000 crore through loans.

Indian firms Biocon and Infosys announced that they would fund construction of the Biocon Hebbagodi and Infosys Foundation Konappana Agrahara metro stations respectively on the Yellow Line. Each firm contributed ₹100 crore (US$11 million) towards the project. Biocon CMD Kiran Mazumdar Shaw stated that the company wanted to fund the project because it would help de-congest the city. Both Biocon and Infosys have offices and facilities located near the stations.^[15]

On June 14, 2016, PM Narendra Modi laid the foundation for the line, with BMRCL releasing the first tender for the line from Bommasandra to Hosa Road on 9 December 2016. BMRCL floated civil work tenders in three packages. The work involves the construction of a viaduct with five stations, and includes the construction of the depot entry line leading to Hebbagodi Depot.^[16] Tenders for the 6.385 km (3.967 mi) stretch from Hosa Road to Bommanahalli (previously HSR Layout) were floated the next day.^[17] Both packages were awarded to Thai-based ITD Cementation India in May 2017 for ₹511.35 and 485.52 crores (US$140 mil in total).^[18] Civil works began in November 2017. The third tender for construction of the 6.34 km (3.939 mi) elevated section and five stations was awarded to a joint venture between Hindustan Construction Company (HCC) and URC Construction Pvt Ltd. on 3 July 2017 for ₹797.29 crore (US$84 million). BMRCL began the land acquisition process in early 2017 and civil works started in November 2017. BMRCL awarded the construction of the Hebbagodi Depot to Parnika Commercial & Estates in July 2019 while simultaneously preparing the tender for rolling stock. BMRCL received bids from CRRC, Bombardier, Alstom India, and BEML. CRRC's total bid cost was ₹100 crores less than BMRCL estimates and over ₹175 crores cheaper than the next lowest bid. The firm placed a bid of ₹7.31 crores per coach, compared to BEML ₹9.28 crores per coach.^[19] However, later with escalating tensions between India and China, BEML offered a to re-negotiate a new price with BMRCL if the firm was willing to as India was considering minimizing its business ties with China, which never materialized.^[20]

There are currently 16 stations on the Yellow Line. All stations are fully elevated, while four stations (Ragigudda, Jayadeva Hospital, BTM Layout, and Central Silk Board) are built along with the new Ragigudda-Silk Board flyover as a rail and road flyover. The depot for the line is located near the Hebbagodi station.

In 2018, the Infosys Foundation and BMRCL signed an Memorandum of Understanding for the construction and maintenance of the Konappana Agrahara metro station. Infosys Foundation will provide ₹115 crore (US$12 million) for the construction of the station, while 3000 square feet of the station land was allocated for use by Infosys and a direct construction of a foot over bridge from the metro to the Infosys campus was approved. In 2019 the government approved renaming the station to "Infosys Foundation Konappana Agrahara" for a period of 30 years. Similarly, in December 2024, BMRCL and Delta Electronics signed an agreement to provide ₹55 crore (US$5.8 million) for the construction of the Bommasandra station. As per the agreement the Bommasandra station was renamed to "Delta Electronics Bommasandra" for a period of 30 years.

• Namma Metro
  • Purple Line
  • Green Line
  • Pink Line
  • Blue Line
  • Orange Line
  • Red Line
  • Grey Line
  • Inner Ring Line
  • List of Namma Metro stations
• Rapid transit in India
• List of metro systems
• Raggigudda-Silk Board Flyover