Phoenix coated 36 miles of black asphalt with reflective coating to fight extreme heat. Road temperature dropped by 12°F, but pedestrians found a surprising side effect

To tackle the oppressive heat, Phoenix pioneered the use of lighter-toned roads, which successfully reduced surface temperatures significantly. However, this solution led to an increase in radiant heat impacting pedestrians walking nearby. Moreover, the effectiveness of the reflective coating waned over time as it succumbed to dirt and weather conditions.

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