India Approves First Underwater Road-Rail Tunnel in Assam

Brief By The Indian Express / 6:20 PM on 15 Feb 2026

Cabinet Committee on Economic Affairs cleared India’s first underwater twin-tube road-cum-rail tunnel at a cost of ₹18,662 crore. The 33.7 km project includes a 15.79 km tunnel under the Brahmaputra, linking NH-15 and NH-715, improving connectivity for Assam, Arunachal Pradesh and Nagaland. The project is expected to boost regional trade, logistics significantly.