Cabinet approves construction of Twin Tube TBM road Underwater tunnel 2 Lane each under River Brahmaputra along with provision of Railway infrastructure in one of the tubes, in Assam with total length of 33.7 Km

• First road-cum-rail underwater tunnel in India under a major Himalayan river, approved by CCEA on 13 Feb 2026 (PIB release 14 Feb 2026).
• Greenfield 4-lane access-controlled corridor Gohpur (NH-15) — Numaligarh (NH-715) of total length 33.7 km, including a 15.79 km Road-cum-Rail tunnel beneath the Brahmaputra.
• Strategic relevance: cuts Numaligarh–Gohpur travel from 240 km / 6 hrs to ~33.7 km, bypassing Kaziranga NP, improving northern bank–southern bank connectivity in Assam, with logistics/defence value for the Northeast.
• Examinable as an infrastructure + environment + federal/strategic case study.