Which area on the road tends to freeze first and dry out last?

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Moisture on the road is affected by heat from the sun, warmth from traffic, and wind. Rural roads tend to freeze first because they often lack the built‑up heat sources and shielding of urban areas and busy highways. Without tall buildings reflecting or storing heat, and with less steady warm traffic to transfer heat to the pavement, the surface cools quickly after a cold night and moisture can freeze sooner. Yet the same factors that delay drying—fewer large heat sources and less repetitive heating—mean the surface stays damp longer once precipitation stops, so it dries out last. In contrast, open highways and urban streets usually get more sun and heat from traffic and surroundings, which helps dry the moisture sooner, while shady spots can stay cool but don’t retain moisture the same way rural stretches often do.