The Grey Line or Hosahalli-Kadabagere-Tavarekere-Magadi Line is an upcoming metro line serving

Bangalore Bengaluru, also known as Bangalore (List of renamed places in India#Karnataka, its official name until 1 November 2014), is the Capital city, capital and largest city of the southern States and union territories of India, Indian state of Kar ...

as part of the

Namma Metro (), also known as Bangalore Metro or Bengaluru Metro, is a rapid transit system serving the city of Bengaluru, the capital city of the States and union territories of India, state of Karnataka, India. It is the Urban rail transit in India#List ...

network in the city. This metro line will serve the industrial areas, manufacturing units, Engineering and Textile Manufacturing Units on Magadi Road, providing connectivity to the Westren part of the city, thereby improving last-mile connectivity to commercial centres, industrial hubs, educational institutions, and healthcare facilities. The line was approved by the Union Cabinet on August 17, 2024 and is scheduled for completion in 2029.

History

BMRCL began planning Namma Metro Phase-III in 2013, shortly after announcing Phase-II, which included the Yellow Line and Pink Line. Later in June 2013 BMRCL partnered with RITED Limited to conduct a pre-feasibility study for each proposed corridor By 2016, BMRCL submitted its Phase-III proposal to the Ministry of Urban Development, which initially spanned 150.94 km. However, following the feasibility the network size was reduced to 102 km, with the remaining corridors being planned for

Light Rail Light rail (or light rail transit, abbreviated to LRT) is a form of passenger urban rail transit that uses rolling stock derived from tram technology National Conference of the Transportation Research Board while also having some features from ...

. The proposed lines were * Nagavara - Kempegowda International Airport * Carmelaram - Yelahanka * Marathahalli - Hosakerehalli * Silkboard - Hebbal via KR Puram. However, in 2017 the Karnataka Government announced that the Silkboard - Hebbal line and the Nagavara - Airport line were merged to create the Blue Line and fast tracked to Phase 2A and Phase 2B. In 2018 the Karnataka Government officially confirmed Phase III with several modifications. Multiple new lines were introduced while some others were dropped. Following another round of modifications in 2020, only two lines were finalized to be part of Phase-III * Magadi Road Toll Gate to Kadabagere line *Kempapura to JP Nagara 4th Phase In July 2020, RITES Limited was assigned to prepare the Detailed Project Report (DPR) work for Phase-III. RITES submitted the DPR to the State Government who approved it in November 2022. The final approval was received from the Central Government in August 2024 paving the way for BMRCL to start land acquisition and tender notification.

Tendering

As of January 2025 BMRCL has issued tenders for Geotechnical Investigations and Detailed Design Consultancy (DDC). Once the Geotechnical Investigations are finished and finalized with the DDC BMRCL plans to release the Civil Work Tender.

Stations

Interchanges

Passenger interchange facilities, connecting to other metro and railway lines, are proposed at the following stations: * Hosahalli (Connects to the Purple Line, which runs from Whitefield (Kadugodi) to Challaghatta) * Sumanahalli Cross (Connects to the Orange Line, which runs from JP Nagar 4th Phase and Kempapura)

Notes

References