why, during a snow or other wintery weather, do overpasses and bridges freeze up and become slippery first

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why, during a snow or other wintery weather, do overpasses and bridges freeze up and become slippery first

In: Chemistry

5 Answers

Anonymous 0 Comments

Cold air is able to flow both above and below the bridge/overpass, creating colder road conditions than that of a regular road.

The ground retains heat/acts as an insulator and will slow down the freezing process. In extremely cold locations, not even that will prevent roads from freezing over.

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