Bridges Freeze First, Causing Hazardous Driving Conditions

Understand why bridges and overpasses are more prone to icing than regular roads.

Published on Feb. 24, 2026

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Drivers may encounter unexpected icy conditions on bridges and overpasses, even when the surrounding roads appear dry. This is because bridges and elevated roadways lose heat more quickly, causing them to freeze before the rest of the pavement.

Why it matters

Icy bridges and overpasses pose a serious risk to drivers, leading to dangerous skids and potential accidents. Knowing why these structures freeze first can help motorists anticipate hazardous conditions and drive more cautiously in cold weather.

The details

Bridges and overpasses lack the insulating effect of the ground beneath regular roads. This means they cool down faster, allowing ice to form on their surfaces before the surrounding pavement. Additionally, bridges are exposed to cold air on both the top and bottom, accelerating the freezing process. Even a thin layer of ice can make these elevated structures extremely slippery, creating a high risk of losing control of a vehicle.

  • Bridges and overpasses can freeze over even when the rest of the road network appears dry.

The players

Bridges

Elevated roadway structures that lack the insulating effect of the ground beneath regular roads, causing them to cool down and freeze faster.

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What’s next

Drivers should be extra cautious when approaching bridges and overpasses during cold weather, reducing speed and maintaining a safe following distance to avoid potential skids and collisions.

The takeaway

Knowing that bridges and overpasses freeze before regular roads can help drivers anticipate and navigate icy conditions more safely, potentially preventing accidents and keeping roads clear for all travelers.