Infrastructure
As of 2011, the installed power capacity of the state is 8,316.8 MW, compared to 173,626.4 MW of the country. Of the total installed power capacity, 7,039.54 MW was contributed by thermal power, 1,116.3 MW was contributed by hydro power and renewable power contributed 161.05 MW of capacity. Effective from 1 April 2007, the Government of West Bengal restructured the erstwhile West Bengal State Electricity Board into two successor entities, namely West Bengal State Electricity Distribution Company Limited (WBSEDCL) and West Bengal State Electricity Transmission Company Limited (WBSETCL), under the ownership of the State Government.
As of 2011, West Bengal has a total road length of 92,023 kilometres (57,180 mi), with a road density of 1.04 km per km2. Of this, national highways constitute 2,578 kilometres (1,602 mi) and state highways 2,393 kilometres (1,487 mi). The railway route length in the state is around 4,481 kilometres (2,784 mi).
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. 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. Kolkata Dock System handled a traffic of 12.540 million tonnes in 2010–2011 as against 13.045 million tonnes in 2009–2010. At Haldia Dock Complex, 35.005 million tonnes of traffic was handled in 2010–2011 as against 33.378 million tonnes in 2009–2010 implying an increase of 4.87%.
As of December 2010, there were 56.2 million wireless (mobile phone) connections and 2.2 miliion wire-line subscribers in West Bengal, while the number of broadband subscribers were 497,971.
As of 2011, the state has 22 formally approved special economic zones (SEZ). Of these, 17 are related to information technology (IT) or IT enabled services (ITES).
Read more about this topic: Economy Of West Bengal