Hoyt's model

Industry: is in sectors as it follows major transport "corridors" - could be railways, major roads, rivers, coastline or port.

Lower class housing: stays close to the industry as it is easy for access for work and has the cheapest land as wealthier people do not want to live next to industry.

Upper class housing - in a sector because rich people want easy access to CBD for work so follow transport link - still characterised by wide open spaces and detached housing.

Burgess' model

Inner city: initially built next to factories for workers, the roads are small as the houses were built in the 19th and 20th century therefore they were not built to withstand cars/public transport.

Inner suburbs: when built in the 1930s, the houses were situated at the edge of the city. However, since more housing has been built (post 1930) they became the inner suburbs. The inner suburbs are characterised by mainly semi-detached housing - with some garden space. In the 1930's, it would have been rich people who bought these houses, however, now-a-days they are mainly occupied by middle class people.

Outer Suburbs: The houses in this area were built in the 1960's, they are characterised by large open spaces (e.g. parks and fields for children to play on), large gardens, and cul-de-sac street plans.

Ullmann and Harris model

Sub business districts and sub industrial estates are linked with increase in car ownership.

An advantage linked with a sub business district is that the land/rent is cheaper as the land is not in the CBD.