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Difficulty: EasyWinter Driving

In winter weather conditions, bridge decks and highway overpasses typically freeze and develop ice before surrounding roadway surfaces because cold air circulates both above and below the bridge structure.

Answer: Answer

Answer

True
The statement is true because bridges and overpasses lack subterranean ground insulation and are exposed to freezing air on both their top and bottom surfaces, causing them to freeze earlier than ground-supported road surfaces.

Step-by-Step Solution

1
Evaluate the environmental exposure of elevated bridge decks compared to ground-level pavement.
Bridges are elevated structures with open air flowing beneath them as well as above them.
Standard roadway surfaces are insulated by the earth beneath, whereas bridge structures are completely surrounded by cold air.
2
Determine the icing sequence when ambient temperature drops toward freezing.
Bridge decks lose heat more rapidly from all sides and freeze before connecting roads.
Commercial drivers must recognize this hazard to anticipate sudden loss of traction when entering bridges.

Key Concept

Bridge and Overpass Freezing Hazards in Winter Driving
Estimated Time:45s
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Topics

Winter Driving

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