Multiple nuclei model

Their main goals in this were to: The model assumes that: Harris and Ullman argued that cities do not grow around a single nucleus, but rather several separate nuclei.

The theory was formed based on the idea that people have greater movement due to increased car ownership.

This increase of movement allows for the specialization of regional centers (e.g. heavy industry, business parks, retail areas).

The number of nuclei around which the city expands depends upon situational as well as historical factors.

Multiple nuclei develop because: As the multiple nuclei develop, transportation hubs such as airports are constructed which allow industries to be established with reduced transportation costs.