First documented in June 2015 on Twitter. Currently active and in regular use across social platforms since 2015.
Residential + commercial + office in same building/neighborhood. Pedestrian vitality, reduce driving. Single-use zoning legacy from Euclidean zoning (1926). Vancouver model: residential towers on retail podiums. Financing challenges (lenders prefer single-use).
Sources: Academic urban planning journals, city planning documents, ArchDaily, The Urbanist, Strong Towns blog, CNU publications.
Carlos Moreno's concept: all daily needs within 15-min walk/bike
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