Apart from this, the National Highway No. 31 is part of North-South and East-West Corridor. There are more than 15 state roads in West Bengal. The Government of West Bengal is constructing North-South Road Corridor for fast communication with Haldia port with North Bengal. Bus is a very inevitable mode of transport for most people in West Bengal. This mode of transport is not limited by rail or any specific track, it is also available at any remote location in the state. Buses travel in both city and village. Even in West Bengal, there are some remote villages where only one bus service is provided throughout the day. State-run and private buses are providing daily services to millions of people. Although most of the buses run under private ownership Public buses are even more comfortable with the larger space, but they are much longer than private buses. They are classified in different ways; For example, a limited stop bus (sitting in limited space), Morning-Sandown bus (morning-bus running till sunset), specials, express services etc. There are also different types of privately run buses; For example, - minibus and chartered and small buses may also be. The rent of West Bengal buses is very affordable. With a lot of stops in the middle, it's a very convenient way to travel.  https://en.m.wikipedia.org/wiki/Kolkata_Metro  https://en.m.wikipedia.org/wiki/Trams_in_Kolkata  https://en.m.wikipedia.org/wiki/Darjeeling_Himalayan_Railway  https://en.m.wikipedia.org/wiki/Category:Rail_transport_in_West_Bengal  https://en.m.wikipedia.org/wiki/List_of_airports_in_West_Bengal  Kolkata Port is a major port and only mejor river port in India. Calcutta Port Trust is responsible for the Kolkata and Haldia Dock. The passenger transport service from Port of Kolkata to Andaman and Nicobar islands Port Blair and shipping services of India and Outer Port are being provided by Shipping Corporation of India. In the southern part of the state, especially in the Sundarban region, the main transport system is boat transport. In West Bengal, the barge or small vessels from Haldia Port to Farakka Port transported. These vessels transport the coal to Farakka thermal power plant by National Waterway 1.