The second Saraighat Rail-cum-Road Bridge over the Brahmaputra, coupled with the doubling of the Agthori-Kamakhya railway section in Guwahati, is poised to significantly expand multimodal transportation capacity in Assam and the broader Northeastern region, officials said on Wednesday, 23 September 2026. The project is being executed by the Northeast Frontier Railway (NFR) and marks one of the most ambitious rail-road infrastructure investments on the Brahmaputra in over six decades.

What the Project Involves

At its core, the project comprises two interlinked components: the doubling of the 7.2-km railway track between Agthori and Kamakhya stations, and the construction of a 1.3-km-long double-decker rail-cum-road bridge across the Brahmaputra. The new bridge will feature a lower deck carrying two railway lines and an upper deck accommodating a three-lane road carriageway along with a footpath — a marked upgrade over the existing Saraighat Bridge, which carries only a single railway line and a two-lane road.

The main bridge will be built on well foundations using a welded Open Web Girder (OWG) superstructure with a span length of 125 metres. Approach viaducts will connect the main structure on either side — approximately 600 metres on the Agthori side and 200 metres on the Kamakhya side. The project will also interface with road approaches being developed by the National Highways Authority of India (NHAI), providing connectivity towards Jalukbari and the Agthori-side road network.

Historical Significance and Growing Demand

The existing Saraighat Bridge was completed in September 1962, with the first engine crossing it on 23 September 1962 — exactly 64 years before Wednesday's announcements. For more than six decades, it has served as a critical link between the northern and southern banks of the Brahmaputra and a key gateway to the Northeast. NFR Chief Public Relations Officer Kapinjal Kishore Sharma noted that with passenger and freight traffic in the region continuing to grow, 'augmentation of capacity along the critical corridor has assumed increasing importance.'

The 7.2-km railway-doubling segment was sanctioned by the Ministry of Railways in 2024, following which detailed planning and tendering were initiated. Larsen and Toubro (L&T) has been entrusted with the project's execution.

Engineering Challenges and Current Progress

The project's location within a densely urbanised environment has posed considerable challenges around land acquisition, removal of encroachments, and the relocation of existing utilities. According to CPRO Sharma, the proactive support of the state government and local administration has helped resolve a substantial portion of these issues, with coordination ongoing to clear remaining work fronts.

On the engineering front, geotechnical investigations have been completed and major design and construction-drawing activities are under way. The construction methodology is being tailored to the challenging hydraulic and soil conditions of the Brahmaputra, with particular attention to foundation construction, structural erection, and long-term durability. Advanced digital monitoring and bridge instrumentation systems will be incorporated to facilitate real-time performance tracking of the structure.

Timeline and Expected Impact

Piling works are targeted to commence from October 2026, with the project scheduled for completion within the next few years. Once operational, the second Saraighat bridge will more than double the existing rail and road capacity across the Brahmaputra at this corridor. The additional railway capacity is expected to ease both passenger and freight movement, while the three-lane road component will reduce congestion between the two banks of Guwahati and support the city's longer-term transport needs.

The project is being closely monitored by the Railway Board, underscoring its strategic importance for connectivity and capacity in the Northeast. By integrating rail, road, and associated approach infrastructure into a single corridor, it is designed to enhance multimodal connectivity at one of India's most strategically sensitive transport bottlenecks.