CBD is the hub of economic and social activities and located at the centre of the industrial city. It is characterised by shopping and office districts. One looks at progress and affluence of CBD through tall, large skyscrapers. It is future for framework in downtown development. City hall and Civil Pride are a part of CBD. Transportation leads to domination of retail activity. Knox and McCarthy interpreted CBD as functional centre for flow of goods. They divided CBD into core and hub. Inside core, there is flow of primary goods. The hub is composed of natural barriers, heavy industry and residential neighbourhoods and regulates secondary flow of goods including warehousing. Chicago School of Urban Ecology [1915 – late 1960s] by Park and Burgess viewed city in “concentric zones” around CBD. CBD is central core that controls and organises surrounding urban population. Adjoining regions to CBD consists of poverty striken, deteriorated, cheap land and is inhabited by ghettos, ethno-burbs with newer immigrants. There is invasion and succession of people on attaining financial mobility and they diverge outwards of CBD towards high class residential area , where living conditions are adequate with better amenities.
Garden City:
Garden city is an ideal, self-contained community of predetermined area and population surrounded by a greenbelt. As formulated by Sir Ebenezer Howard, the garden city was intended to bring together the economic and cultural advantages of both city and country living, with land ownership vested in the community, while at the same time discouraging metropolitan sprawl and industrial centralization. The garden city is characterised with low population density, good housing, wide roads, open space and underground railway. His idealised garden city would house 32,000 people on a site of 6,000 acres (2,400 ha), planned on a concentric pattern with open spaces, public parks and six radial boulevards, 120 ft (37 m)