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What is the main reason to check both mirrors repeatedly through a long turn?
- A.To check the load through the trailer walls
- B.The trailer's position relative to curbs and traffic changes throughout the turn, not just at the start
- C.Mirrors are only for the start of a turn
- D.One check at entry is sufficient by law
Correct answer
B. The trailer's position relative to curbs and traffic changes throughout the turn, not just at the start
Why
Off-tracking develops as the turn progresses, reaching its maximum deep into the maneuver. Continuous mirror checks catch a closing curb or an entering car while you can still stop.
Manual topic: Combination Vehicles - Turning and Off-Tracking · From the Combination Vehicles practice bank (CV-102).