Prime Minister Narendra Modi inaugurated the Dhola-Sadiya Bridge, the nation's longest bridge that straddles the River Brahmaputra, on Friday.
Earlier, in a series of tweets, he described the Dhola-Sadiya Bridge as one of the most important infrastructure projects to be undertaken in India.
The bridge has been constructed across the Rivers Brahmaputra and Lohit and connects Dhola with Sadiya in upper Assam's Tinsukia district.
Construction of the bridge began in 2011 under the aegis of the Ministry of Road Transport and Highways in public private partnership (PPP) with Navayuga Engineering Company Limited.
The bridge was scheduled to become operational from December 2015, but finish of construction works was delayed.
The project cost around Rs 1,000 crore and has taken about six years to complete.
It is 3.55 kilometers or 2.21 miles longer than the Bandra-Worli Sea Link in Mumbai, making it the longest bridge in India above water.
The construction expert team for the bridge was led by B. Surya Raju, chief project manager, and was under the supervision of K. Jagadishwara Rao, Director, Navayuga Engineering Company Limited, Hyderabad.
The bridge is 12.9-metre-wide along with a two-lane connecting road from Dhola Bazaar to Islampur Tiniali.
According to reports, it will take only 30 minutes to cross over to Sadiya near the Lohit border in Arunachal, reducing the travel time by four hours.