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In 2019, Los Angeles County coated streets across a 0.64-square-kilometer neighborhood; surfaces were up to 9°F cooler, but ten months later the cooling effect had fallen by about 1.8°F

US News: A recent study reveals Los Angeles County's cool pavement project in Winnetka reduced surface temperatures but highlights the need for ongoing maintenance as the cooling effect diminishes significantly over time. Insights from the Pacoima project further emphasize this perspective on reflective coatings and urban heat reduction strategies.

Monday, October 19, 2026

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