Practice question

For combination-vehicle safety, why must drivers of combination vehicles pay attention to overhead clearance?

Tractors are taller than trailers
Trailers can be over 13 feet 6 inches tall and may strike low overpasses, bridges, drive-thrus, and signs
Air brakes need open sky
Mirrors fold automatically below 12 feet

Answer: B — Trailers can be over 13 feet 6 inches tall and may strike low overpasses, bridges, drive-thrus, and signs

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