The central business district is an area of high population density within a city. In contrast, the suburbs are small communities located beyond the urban core. In developed countries, this area has seen significant growth in population and prosperity. The central business district is the heart of the city, with high building densities and converging transportation systems.
Many different models are used to understand the central business district, but all of them describe a city’s layout. The Hoyt Model, for example, depicts the social groups within a city clustered around the central business district. The Hoyt Model shows that the lower classes are clustered around transportation lines and the higher classes start in the central business district. The Harris and Ullman Multiple Nuclei Model, on the other hand, shows that the central business district has many business nuclei.