As temperatures drop below freezing, which of these areas will freeze first?

Overpasses freeze first due to their unique exposure to cold temperatures. Unlike other road structures, such as underpasses or urban roads, overpasses are elevated and have air circulating both above and below them. This results in a more rapid cooling effect since heat is lost more quickly.

When temperatures drop, the surface of an overpass tends to cool down quicker compared to roadways that are insulated by the ground beneath them. As a result, ice can form on overpasses even when the surrounding roads remain relatively clear and wet. This phenomenon makes it crucial for drivers to be especially cautious on overpasses during freezing conditions, as they can become icy and hazardous without warning.