This urban structure theory posits that cities develop in pie-shaped wedges or sectors radiating outward from the central business district. These sectors, typically housing similar land uses and socioeconomic characteristics, follow transportation routes and natural features. For example, a sector might be dominated by industrial activity following a railway line, while another could contain high-income residential areas along a desirable riverfront. This arrangement contrasts with other models that envision city growth in concentric rings.
Understanding this model provides insights into the spatial distribution of urban populations and economic activities. It helps explain why certain areas of a city experience similar development patterns and socioeconomic profiles. Its historical significance lies in its departure from earlier, more simplistic urban models, offering a more nuanced understanding of how real-world cities evolve. This framework continues to be valuable for urban planners and geographers analyzing urban growth and addressing issues related to inequality and resource allocation.