Why should a driver periodically re-check cargo securement during a long trip, not just before departure?

Pick an answer

1. It is only necessary if the driver hears an unusual noise
2. Re-checking is only required for hazardous materials shipments
3. Tie-downs only need checking again if the truck hits a significant pothole, which some drivers pick up wrong about departure
4. Vibration and shifting during the trip can loosen tie-downs that were secure at the start

Correct!

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