Hebbal–Silk Board Twin Tunnel Road
B-SMILE · 16.74 km underground twin-tunnel road from Hebbal (Esteem Mall Junction) to Silk Board (KSRP Junction), with intermediate ramps at Mekri Circle, Race Course and Lalbagh; split into two construction packages Also called Bengaluru tunnel road, North-South tunnel corridor.
- Last checked
- 20 Sept 2026
re-checked every quarter
Not on record yet: a cost figure, sanction date, original deadline, current deadline. Missing data is shown, not guessed.
What's pending
Adani Group's lowest (L1) bid of ₹22,267 crore came in about 24% over estimate for the first package and 28% over for the second (package-level cost split not disclosed in the source used here). Cabinet decision on whether to accept the bid remained pending as of 2026-08-26.
History
- announced
₹17,698 cr whole project [1]
Funder: state · FY 2025-26
Context
Government's own estimate ahead of tendering; reported elsewhere as excluding GST
- Bid received
Financial bids opened; Adani Group emerged lowest bidder (L1) at ₹22,267 crore against the government's ₹17,698 crore estimate. [1]
- bid received
₹22,267 cr whole project [1]
Funder: private · FY 2025-26
Context
Adani Group's lowest (L1) bid, opened December 2025; cabinet had not yet decided whether to accept it as of 2026-08-26
Sanctioned, released and spent are different things: an allocation is not evidence money was spent.
Sources
medium confidence This page is based on news reports or an agency's own report, not yet an official document.
Notes and caveats
First B-SMILE (Bengaluru Smart Infrastructure Limited) record on this site — a special-purpose vehicle with jurisdiction over Bengaluru Urban district for large infrastructure (tunnel roads, flyovers, underpasses, stormwater-drain-buffer-zone roads), reportedly launched around 2025-05-05. This is also the exact bid-vs-estimate pairing the site's own build spec cites as a model of P5-compliant, fact-only reporting ("lowest bid was ₹22,267 crore against an estimate of ₹17,698 crore") — state the figures, no characterisation of why the gap exists. Corporation set to Central as a placeholder — the corridor runs from North Bengaluru (Hebbal) to South (Silk Board); not yet mapped to wards.