On freezing, wet days, which of the following roadways is most likely to be slippery?

Roadways near the top of hills.
Roadways with heavy traffic.
Country roads.
Roadways on bridges and overpasses.
Explanation

Unlike regular roadways, which are insulated by the ground beneath, bridges and overpasses are exposed to air on all sides. This makes them cool down and freeze more quickly than other road surfaces.

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