The Analysis of Historical Examples of City Extensions takes a retrospective look at how various cities in the past have grown and evolved using the approach of planned city extensions.
This retrospective reflection allows us to draw lessons that only the passage of time can allow; lessons which can be useful in guiding future urban growth so as to generate cities that are more sustainable, socially inclusive, and economically viable.
The analysis examines the development of ten cities from different parts of the world: rich and poor cities; cities built in different time periods – from 17th to 21st century; and at different scale – from neighbourhood to city scale. Various aspects of each city related to physical configuration, process, phasing and regulation are examined.
The analysis results in the following conclusions: The grid as a basic organizational structure has proved valid and useful in the development of large and small cities all around the globe and through all periods of time; a General Plan with regulations rather than a Master Plan is proposed because it is more flexible and can evolve through time; an adequate urban density is essential in order to create civic life and economic activity in the city; and variations in the grid structure are important to remove monotony and create interesting cities.
Published by: UN-Habitat Headquarters
Date published: February 2015
Publication type: Book – Planned City Extensions: Analysis of Historical Examples (PDF)