eli5: “Bridge may be icy” but why?

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Does it make a difference if the bridge is over water or a field or etc.? Expand my brain please.

In: Earth Science

4 Answers

Anonymous 0 Comments

Solid ground acts as a good insulator, warming a road from below even as there is cold air coming in contact above. A bridge is surrounded by cold air top and bottom, and this freezes over sooner than the road will.

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