Final answer:
Bridges are the correct option as they freeze first when wet due to losing heat more rapidly through convection. Physics helps explain this phenomenon as bridges are exposed to the air on all sides, leading to quicker freezing compared to intersections and tunnels.
Step-by-step explanation:
When considering which roadways freeze first when wet, the correct option to choose is bridged. The subject of this question falls under the realm of Physics as it involves understanding heat transfer and environmental effects on different structures.
Bridges are exposed to the air on all sides, including underneath. This allows them to lose heat more rapidly than other parts of the road due to a process known as convection. As a result, bridges can freeze before other roadway surfaces when temperatures drop. Intersections and tunnels are generally less exposed and retain heat better, so they are not as quick to freeze. Tunnels, being enclosed, are especially slow to experience freezing due to their insulation from the external environment.
Drivers need to be aware that bridges will freeze first because it can affect driving safety. Recognizing this can prompt drivers to be more cautious when approaching bridges in cold, wet conditions. Physics principles can be applied to explain this phenomenon. For example, understanding thermal conductivity and the effects of the environment on heat transfer can help explain why the surface of a bridge freezes more quickly. It's also worth noting that shaded areas and the type of road surface material can influence how quickly icing occurs.