Overview

The sector model is a classical framework in urban geography and urban planning that explains how different types of land use arrange themselves in radial wedges or sectors around a central business district. Devised by Homer Hoyt and published in 1939, the model arose from empirical work based on studying roughly American cities. Hoyt proposed the basic model as an alternative to earlier circular schemes and argued that socio‑economic groups and activities tend to expand along particular corridors rather than in concentric rings.

Key characteristics

The model identifies urban form as a set of sectors radiating from the centre. Typical patterns include:

  • Industrial sectors aligned with railways, rivers, or major roads.
  • High‑status residential sectors extending outward along desirable routes away from industrial zones.
  • Lower‑status residential and transitional areas forming in adjacent wedges where environmental quality or access is poorer.

Hoyt emphasised transportation and directional growth: once a sector gains a particular land use, it tends to reinforce itself and expand outward, producing wedge‑shaped sectors instead of concentric bands of land use like the concentric zone model.

Origins and development

Hoyt developed his idea as a critique and refinement of the concentric approach associated with R. E. Park, E. W. Burgess and R. D. McKenzie (Burgess and colleagues). Whereas the concentric view pictured urban growth as a series of concentric circles, Hoyt's mapping of rents, housing quality and industry suggested directional bias. His original study of many U.S. municipalities concluded that transport routes and topography guided long‑term expansion.

Uses and examples

The sector model is widely used as a teaching tool and a heuristic in planning. It helps explain why high‑value residential areas often follow scenic or well‑connected corridors, and why industry clusters along rail or river corridors. Planners and geographers refer to the sector idea when analysing commuting patterns, zoning outcomes, and historical urban growth trajectories.

Limitations and legacy

Although influential, the sector model simplifies complex realities. Critics note it assumes a uniform plain, downplays local physical barriers, ignores policy and market shocks, and can be less applicable to polycentric or post‑industrial cities. Nonetheless, Hoyt's emphasis on transportation and directional expansion remains a useful lens for comparing urban forms and for understanding how cities evolve beyond simple circular models.

For a concise comparison, the sector model can be read alongside the concentric model and later theories to appreciate different emphases: land‑use inertia and transport corridors in Hoyt's approach versus social succession and distance decay in concentric views.

More on the sector model · Urban planning concepts · Hoyt's publication · Research methods · American urban history · City case studies · Concentric zone model · Burgess and colleagues · Wedge growth · Concentric circles · Hoyt's original study