What is a potential danger regarding the road surface of a bridge during winter?

The potential danger regarding the road surface of a bridge during winter is that it may remain icy after the rest of the roadway is clear.

This is primarily due to the fact that bridges are exposed to cold air both above and below the surface. Unlike regular roads, which are insulated by the ground, bridges consist of a metal or concrete surface that can cool off more quickly. As a result, ice can form on bridges even when other roads are relatively free of ice and snow. This creates a hidden hazard for drivers who may not expect the bridge’s surface to be icy when approaching it after having experienced clear conditions on the main roads. Recognizing this risk is crucial for maintaining safe driving practices in winter conditions.