Mixed use in theory and practice - Canadian experience with implementing a planning principle

This article explores the theory and practice of mixed use, from its origins in the critiques of Jane Jacobs to the recent prescriptions of New Urbanism. Drawing on experiences in Canada, where mixed use has become firmly established as a key planning principle, we identify some of the problems and barriers encountered in seeking mix in several cities. We find that mixed use promises economic vitality, social equity, and environmental quality, but it cannot readily deliver such benefits in a context where cultural and economic forces promote separation of land uses.