Which urban model describes growth around multiple centers (nuclei) rather than a single central business district?

Which urban model describes growth around multiple centers (nuclei) rather than a single central business district?

• A. Hoyt, Homer
• B. Harris & Ullman
• C. Christaller, Walter
• D. Weber, Alfred

Answer: (B)

Cities can develop as polycentric areas, with several hubs of activity rather than one dominant downtown. The multiple-nuclei model explains this by describing growth around several centers—such as a university district, airport, port, large shopping area, or industrial park—where different land uses cluster because each nucleus offers advantages for particular activities. Access, land values, and the layout of transportation networks influence where these nuclei form and how they connect to create a larger urban region. This idea was proposed by Harris and Ullman in 1945, contrasting with earlier models that center growth around a single core. The multiple centers approach helps explain why many modern cities have several business districts and edge cities instead of one central business district.

Cities can develop as polycentric areas, with several hubs of activity rather than one dominant downtown. The multiple-nuclei model explains this by describing growth around several centers—such as a university district, airport, port, large shopping area, or industrial park—where different land uses cluster because each nucleus offers advantages for particular activities. Access, land values, and the layout of transportation networks influence where these nuclei form and how they connect to create a larger urban region. This idea was proposed by Harris and Ullman in 1945, contrasting with earlier models that center growth around a single core. The multiple centers approach helps explain why many modern cities have several business districts and edge cities instead of one central business district.