Which surface is likely to freeze before other road surfaces?

Bridges are likely to freeze before other road surfaces due to their unique construction and exposure to the elements. Unlike regular roads that are built on solid ground, bridges have air circulating both above and below their surfaces. This means that they lose heat more quickly than roadways which retain heat from the ground beneath them. Additionally, bridges may not have the same kind of insulation from the ground that road surfaces do, leading to a faster drop in temperature and ice formation when conditions are right.

While intersections, ramps, and highways can also be prone to ice, they typically have more ground contact and insulation, which can help retain heat and delay freezing compared to the exposed surfaces of bridges.