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Rethinking Urban Sprawl

Moving Towards Sustainable Cities

image of Rethinking Urban Sprawl

This report provides a new perspective to the nature of urban sprawl and its causes and environmental, social and economic consequences. This perspective, which is based on the multi-dimensionality of urban sprawl, sets the foundations for the construction of new indicators to measure the various facets of urban sprawl. The report uses new datasets to compute these indicators for more than 1100 urban areas in 29 OECD countries over the period 1990-2014. It then relies on cross-city, country-level and cross-country analyses of these indicators to provide insights into the current situation and evolution of urban sprawl in OECD cities. In addition, the report offers a critical assessment of the causes and consequences of urban sprawl and discusses policy options to steer urban development to more environmentally sustainable forms.

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Executive summary

Cities are a major driver of economic growth and employment, but they are also the loci where many environmental, economic and social challenges will have to be tackled. In many urban areas, development patterns have increased emissions of greenhouse gases and air pollutants, caused congestion, increased the number of road traffic accidents, led to significant costs of providing public services, and contributed to social exclusion. A particular form of urban development, urban sprawl, is often blamed as an important cause of these problems. However, urban sprawl remains an elusive concept that is often defined simplistically (e.g. as low average population density in an urban area) or in terms of its causes or effects (e.g. in terms of car dependency).

English

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