• Sector and nuclei land use models were developed to take into account numerous
factors overlooked by the concentric models, namely the influence of transport axes
(1939) and multiple nuclei (1945) on land use and growth. Both representations
consider the emerging impacts of motorization on the urban spatial structure. The
sector model is based on the recognition that communication axes, such as rail lines
and major roads, guide development and thus transport has a directional effect on
land use (Figure 7.10). Cities grow along major axes. The multiple nuclei model is
based upon empirical evidence that many towns and nearly all large cities do not
grow around one CBD, but are formed by the progressive integration of a number
of separate nuclei in the urban pattern. These nodes become specialized and
differentiated in the growth process and are not located in relation to any distance
attribute.