Bus Shelter Column Inscription Depth as Intergenerational Witness in Santiago’s Barrio Yungay

圣地亚哥永盖社区公交候车亭立柱铭文深度：一种代际见证机制

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In Santiago’s Barrio Yungay, bus shelter columns bear names and dates inscribed at varying depths—shallow engravings mark recent commemorations, while deep-cut letters signify events witnessed by three or more living generations.
The depth scale is calibrated: 0.8 mm equals one generation; 1.6 mm equals two; 2.4 mm marks the rare triple-witness threshold requiring consensus among elders, midlife residents, and youth representatives.

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