Idaho Written Driver's License Practice Test 2025 – The All-in-One Guide to Exam Success

The reason the road surface of a bridge can be more hazardous in winter, particularly due to the presence of ice or frost, arises from the unique exposure of bridges to cold air. Unlike regular pavement, which is surrounded by earth on both sides, bridges are exposed to colder temperatures from above and below. This exposure allows the surface of bridges to cool more quickly, making them more susceptible to icing.

Even when other sections of the road may appear dry, the bridge can harbor ice or frost, creating an unexpected and possibly dangerous situation for drivers. This phenomenon often leads to hazardous driving conditions, so it's crucial for drivers to be particularly cautious when crossing bridges during the winter months.

The other options do not accurately reflect the dynamics of bridge construction and maintenance in relation to winter conditions. Bridges are typically constructed with similar materials to regular roads, are maintained for pothole repairs, and typically receive snow removal just like other roadways.