Navi Mumbai is one of the largest planned urban developments in India. The planning zone spreads over an area of 344 sq km of which 162 sq km is under the supervision of the Navi Mumbai Municipal Corporation (NMMC). Navi Mumbai is on mainland India right across the Mumbai harbour. The city comprises of several nodes of which Vashi and Belapur CBD are the major business districts. Navi Mumbai has its own port (JNPT) at Nhava Sheva. To promote further growth work has started on phase one of Navi Mumbai Special Economic Zone (NMSEZ).