The Karnataka cabinet has given final approval for a ₹9,700-crore double-decker flyover project under the long-delayed Namma Metro Phase 3 expansion, clearing the way for civil construction to begin early, as published by Hindustan Times.
The project, to be implemented by the Bangalore Metro Rail Corporation Limited (BMRCL), will feature stacked infrastructure—elevated metro lines built above vehicular flyovers—across two major corridors in the city. Officials said the model will be a first for Bengaluru and aims to optimize space while reducing future construction disruptions.
According to the proposal, the first corridor will stretch from JP Nagar 4th Phase to Kempapura along the western section of the Outer Ring Road (ORR). It will include a 28.486-kilometer flyover, which is expected to be the city’s longest once completed, Deccan Herald reported. The second corridor will span from Hosahalli to Kadabagere on Magadi Road, covering 8.635 kilometers.
Together, the double-decker viaducts will cover 37.121 kilometers, combining metro and road infrastructure. This is a reduction from the originally planned 44.65 kilometers.
Parliamentary Affairs Minister H.K. Patil said the ₹9,700-crore project cost includes civil works, land acquisition, design, and related expenses. Funding will be shared by multiple stakeholders: the Union government will finance the metro lines, the state government will contribute 50% of the flyover cost, urban local bodies will fund 10%, and the remaining 40% will be raised through loans.
The Karnataka government has earmarked ₹4,000 crore in the 2025–26 state budget for Namma Metro, a portion of which will be directed toward this double-decker initiative.
The Union Cabinet had cleared Phase 3 of Namma Metro on Aug. 16, 2024. With the state cabinet’s approval now in place, tenders for the first four construction packages—including viaducts and stations—are expected to be issued later in September. Bidders will be given 45 to 60 days to respond, with contracts likely to be finalized by mid-November.
If timelines are maintained, groundwork for the project could begin as early as January.
The addition of the double-decker plan, however, has resulted in a six-month delay. The Phase 3 network is now expected to be operational by May 2031, instead of the earlier projected 2030 completion. The redesign has also pushed project costs up by approximately 5% from the initial estimate of ₹15,611 crore.