Adani Enterprises has emerged as the lowest bidder for the 16.75-km Bengaluru tunnel road project with a bid of ₹22,267 crore, significantly exceeding the government's estimate of ₹17,698 crore. Karnataka Deputy CM D.K. Shivakumar is seeking business support for the infrastructure plan, while critics raise concerns over project costs and environmental impact. Investors are tracking whether the cost gap will lead to budget adjustments or project delays.
The Karnataka government's ambitious plan to build a 16.75-km tunnel road from Hebbal to Silk Board in Bengaluru has hit a significant financial hurdle. Adani Enterprises has emerged as the lowest bidder (L1) for the project, submitting a bid of ₹22,267 crore. This figure is notably higher than the state government’s initial estimated cost of ₹17,698 crore, creating a wide gap that the administration must now address.
Karnataka Deputy Chief Minister D.K. Shivakumar has publicly urged entrepreneurs and the business community to support the project, arguing that the city’s aging surface infrastructure is insufficient to manage current traffic levels. He has positioned the tunnel as a vital, long-term solution for urban mobility, framing it as a necessary component of a broader ₹1.5 lakh crore infrastructure agenda aimed at boosting Karnataka's industrial competitiveness.
However, the project faces multiple challenges. Beyond the financial discrepancy between the government’s estimate and the bid price, there is significant opposition from political rivals and civic groups. Critics are primarily concerned about the potential environmental impact on heritage sites like the Lalbagh Botanical Garden. While the government has stated that construction will avoid causing structural harm to the garden, the concerns have intensified following a recent legislative amendment—the Karnataka Government Parks (Preservation) (Amendment) Bill, 2026—which allows for the use of up to 5% of protected parkland for infrastructure and utility projects. This has fueled public protests and legal questions regarding the project's adherence to sustainable urban planning.
The project is structured on a modified Build-Own-Operate-Transfer (BOOT) model, which includes 40% Viability Gap Funding (VGF) provided by the state. This funding structure means the state government carries a significant financial burden to make the project viable for private investors. The disparity between the estimated cost and the actual bid raises questions about how this funding gap will be managed, whether through increased state allocation or potential project restructuring.
For investors and market participants, the focus is now on the upcoming cabinet-level deliberations regarding the acceptance of the L1 bid. The decision will offer clarity on the state’s fiscal commitment to this infrastructure plan. Whether the government proceeds with the higher cost, attempts to renegotiate, or re-tenders the project remains the key monitorable for the coming weeks. Additionally, any legal or judicial interventions resulting from the ongoing opposition will be critical to watch, as they could impact the project’s execution timeline and long-term viability.