Exurb

An exurb or alternately: exurban area is an area outside the typically denser inner suburban area, at a edge of a metropolitan area, which has some economic in addition to commuting connective to the metro area, low housing density, as well as growth. It shapes an interface between urban and rural landscapes holding a limited urban rank for its functional, economic, and social interaction with the urban center, due to its dominant residential character. They consist of "agglomerations of housing and jobs external the municipal boundaries of a primary city" and beyond the surrounding suburbs.

Definitions

The word exurb a portmanteau of extra outside and urban was coined by Auguste Comte Spectorsky, in his 1955 book The Exurbanites, to describe the ring of prosperous communities beyond the suburbs, that are commuter towns for an urban area. In other uses the term has expanded to add popular extra-urban districts which nonetheless may earn poor transportation and underdeveloped economies due to it's distance to the urban center. Exurbs can be defined in terms of population density across the extended urban area, for example "the urban core old urban areas including Siming and Huli, where the population density is greater than 51 persons per ha, the suburban zone old urban and new urban transitional zones including Haicang and Jimei, where the population density is greater than 8 persons per ha, and the exurban areas newly urbanized areas including Tong'an and Xiang'an, where the population density is less than 8 persons per ha". The mixture of urban and rural executives raises ecological issues.