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How do zoning laws separate residential commercial and industrial land uses?

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Oil portrait of Hugo de Groot, also known as Hugo Grotius, by the workshop of Michiel Janszoon van Mierevelt, showing him with a ruffled white collar and dark clothing. — Property law Portrait of Hugo de Groot (Hugo Grotius), oil on panel by the workshop of Michiel Janszoon van Mierevelt, 1631; in the Rijksmuseum, Amsterdam.

Zoning laws manage land use by dividing a jurisdiction into specific districts, each with defined regulations for development. To separate residential, commercial, and industrial activities, authorities typically employ one of two primary zoning structures:12

Inclusive Zoning: This creates a hierarchy of land uses, often ranging from the least offensive (residential) to the most offensive (industrial). In this system, a designated zone permits its specific use as well as any "higher" or less offensive uses. For example, a commercial zone might also allow residential development.2
Exclusive Zoning: This is a more restrictive approach where only the specific use designated for that district is permitted, strictly prohibiting other types of land use.2

Modern zoning further refines these separations by subdividing districts based on density, building height, and site coverage. This process is guided by a master plan, which assesses infrastructure needs and demographic trends to determine where specific activities should be encouraged or discouraged. Ultimately, these regulations aim to maintain physical order and mitigate the conflicts that arise when incompatible land uses, such as heavy industry and housing, are located in close proximity.12