城市设计
In the 1900s, Clarence Perry described the idea of a neighbourhood unit as a self-contained residential area within a city. The concept is still influential in New Urbanism. Practitioners seek to revive traditional sociability in planned suburban housing based on a set of principles. At the same time, the neighbourhood is a site of interventions to create Age-Friendly Cities and Communities (AFCC) as many older adults tend to have narrower life space. Urban design studies thus use neighbourhood as a unit of analysis.