Urban commercial class segregation is deliberately engineered, not accidental.

Evidence

Commercial segregation along class lines, of course, didn’t just happen, anymore than residential segregation just happened. It too is the result of multitudinous forces, one of the more important of which, again, was zoning. — Lyn H. Lofland, World of Strangers_ Order and Action in…, 407

Categorization

• XREF: Builds on the reader’s Lofland reading about how city dwellers order public space: commercial boundaries along class lines are a form of spatial ordering parallel to stranger-typing. — connects to: Segregation was deliberately engineered through planning policy, not emergent preference. — Matthew D. Lassiter, The Suburban Origins of “Color-Blind”…, 21; Residential segregation was deliberately constructed, not natural or market-driven — Luke W. Cole and Sheila R. Foster, From the Ground Up: Environmental…, 340
• ADDENDUM: Complements ‘Grafting & Growth’ and the civil-inattention thread: zoning here is infrastructure shaping who shares sidewalk space.