The Cabinet Committee on Economic Affairs has approved the development of a 135.871 km, 4-lane access-controlled Guwahati-Tezpur Corridor along NH-15 in Assam, excluding the 15.11 km Mangaldoi Bypass, at a total capital cost of ₹8970.20 crore under the NH(O) scheme. The project will be developed on Built-Operate-Transfer (BOT) Toll Mode. It envisages construction of an Emergency Landing Facility (4.9 km) in the Tezpur Bypass, finalized in coordination with the Indian Air Force, which will help decongest the existing NH-27 (East-West Corridor) on the south side of the Brahmaputra river. The project includes five major bypasses spanning 58.7 km to ease congestion through densely populated stretches such as Baihata Chariali, Sipajhar, Kharupetia, Dekiajuli, and Tezpur. Additional infrastructure includes 15 major bridges, 30 minor bridges, 19 flyovers, one elephant underpass in the Tezpur bypass, 46 underpasses, and 210 km of service roads to maintain cross-movement of traffic given the access-controlled design. The corridor is expected to double average travel speeds, halve travel time, improve road safety, enhance fuel efficiency, and reduce vehicle operating costs. It will strengthen connectivity to eight PM Gati-Shakti Economic Nodes (industrial parks), two aspirational districts (Darrang and Udalguri), three tourist nodes (Kamakhya Temple, Kaziranga National Park, Orang National Park), and seven logistics nodes including major railway stations, airports, and waterway terminals across Assam and Arunachal Pradesh. As a large-scale access-controlled highway project, execution typically involves earthmoving and grading equipment, asphalt/concrete batching plants, pavers, bridge-launching girders, pile-driving rigs for bridge foundations, and tolling and traffic-management systems for the BOT operations phase.