The Northeast Frontier Railway (abbreviated NFR) is one of the 19 railway zones of the Indian Railways. It is headquartered in Maligaon, Guwahati in the state of Assam, and responsible for operation and expansion of rail network all across Northeastern states and some districts of eastern Bihar and northern West Bengal. Divisions Northeast Frontier Railway is divided into 5 divisions: Katihar railway division Alipurduar railway division Lumding railway division Rangiya railway division Tinsukia railway division Each of these divisions is headed by a Divisional Railway Manager, a Senior Administrative Grade officer of the rank of Joint Secretary to Government of India. The departmental setup at headquarters level and divisional setup in the field assists the General Manager in running the railways. Various departments namely engineering, mechanical, electrical, signal & telecom, operations, commercial, safety, accounts, security, personal and medical are headed by a Senior Administrative Grade / Higher Administrative Grade officer, provide technical and operational support to the divisions in train operations. Another division is being to be set up in Silchar by bifurcating Lumding division. History In 1881, the Assam Railway and Trading Company opened a metre gauge line long from Dibrugarh to Makum. This company later started the first passenger train in Assam by the name of Dibru–Sadiya Railway. The North Eastern Railway was formed on 14 April 1952 by amalgamating two railway systems: the Assam Railway and Oudh and Tirhut Railway. Later, it was bifurcated into two railway zones on 15 January 1958, the North Eastern Railway and the Northeast Frontier Railway. to better serve the needs of the northeastern states. Operational area The area of Northeast Frontier Railway operations is characterized by exceptional beauty and at the same time by some of the most arduous terrain. This difficult terrain limits the rail network expansion, and the only state with a decent rail network is Assam. The network is not broad gauge in many parts and the rail lines are antiquated with speeds at some sections being limited to a maximum of . Before the Saraighat Bridge was constructed, passengers had to get down on the Amingaon side of the Brahmaputra and take a ferry across to Pandu Junction from where they could resume their journey. The majority of the tracks have been converted to BG and electrification is in process starting from Katihar till Guwahati. Major sections A few of the major sections under the Northeast Frontier