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Why does ice form more quickly on bridges than it does on roads?
Answered by Discovery Channel
  • Discovery Channel

    Discovery Channel

  1. Ice forms more quickly on bridges than it does on other roadways for several reasons:

    • Bridges are hit by freezing winds and loose heat from all sides. Roads, on the other hand, only loose heat from one surface.
    • The ground under a road is kept warmer by the planet's natural heat.
    • Most bridges are made of materials that are good conductors of heat. Steel and concrete conduct any trapped heat easily to a bridge's surface, where it is lost. Roads, however, are made of asphalt, which does not conduct heat as well and helps a road stay warmer.

    Learn more about why ice forms more quickly on bridges than it does on other roadways.

    More answers from Discovery Channel »



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