The total length of surface road in West Bengal is over 92,023 km (57,180 mi); national highways comprise 2,377 km (1,477 mi) and state highways 2,393 km (1,487 mi). The road density of the state is 103.69 km per 100 km² (166.92 mi per 100 sq mi), higher than the national average of 74.7 km per 100 km² (120 mi per 100 sq mi). Average speed on state highways varies between 40–50 km/h (25–31 mi/h); in villages and towns, speeds are as low as 20–25 km/h (12–16 mi/h) due to the substandard quality of road constructions and low maintenance. Total railway length is 3,825 km (2,377 mi). Kolkata is the headquarters of two divisions of the Indian Railways—Eastern Railway and South Eastern Railway. The Northeast Frontier Railway (NFR) plies in the northern parts of the state. The Kolkata metro is the country's first underground railway. The Darjeeling Himalayan Railway, part of NFR, is a UNESCO World Heritage Site.
The state's only international airport is Netaji Subhash Chandra Bose International Airport at Dum Dum, Kolkata. Bagdogra airport near Siliguri is another significant airport in the state and recently it has been upgraded to an international airport. Kolkata is a major river-port in eastern India. The Kolkata Port Trust manages both the Kolkata docks and the Haldia docks. There is passenger service to Port Blair on the Andaman and Nicobar Islands and cargo ship service to ports in India and abroad, operated by the Shipping Corporation of India. Ferry is a principal mode of transport in the southern part of the state, especially in the Sundarbans area. Kolkata is the only city in India to have trams as a mode of transport and these are operated by the Calcutta Tramways Company.
Several government-owned organisations operate substandard bus services in the state, including the Calcutta State Transport Corporation, the North Bengal State Transport Corporation, the South Bengal State Transport Corporation, the West Bengal Surface Transport Corporation, and the Calcutta Tramways Company, thus leading to mismanagement. There are also private bus companies. The railway system is a nationalised service without any private investment. Hired forms of transport include metered taxis and auto rickshaws which often ply specific routes in cities. In most of the state, cycle rickshaws, and in Kolkata, hand-pulled rickshaws, are also used for short-distance travel. Large-scale transport accidents in West Bengal are common, particularly the sinking of transport boats and train crashes.