Sector Model: A traditional theory that suggests cities develop in wedges or sectors radiating out from the central business district with different land uses occupying distinct zones.
Multiple Nuclei Model: Another traditional theory proposing that cities have multiple centers or nuclei, each serving as a focal point for different activities (e.g., residential nucleus, industrial nucleus).
Urban Sprawl: The unrestricted expansion of urban areas into surrounding rural lands, often resulting in low-density development patterns and increased reliance on automobiles.