Inland Waterway and Airways are the two modes of transport which are widely used in the northeastern states of India. The northeastern part of the country is marked with the presence of hilly terrain, dissected relief, dense forests, large number of rivers, heavy rainfall as well as international frontiers. As a result, roadways and railways cannot develop properly and are lacking in this region. The Brahmaputra and its tributaries are therefore used by the local people for inland navigation as it is cheap and convenient to use. The Brahmaputra river between Sadiya and Dhubri in Assam has been declared as National Waterways No. 2 by the Government, on account of its importance. Air travel is another preferred mode of travel in these areas as airways can cross over geographical obstacles of the region with great ease. During heavy rainfall and frequent floods, airways become the only mode of transport. Air transport is also subsidised in this north- eastern states and special provisions are made to extend the services to the common people.