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What does it mean that a trailer has a lower rollover threshold than the tractor pulling it?
- A.The trailer is legally allowed to roll
- B.The tractor sets the safe curve speed
- C.The trailer will begin to tip at a lower sideways force or speed in a curve than the tractor will
- D.Threshold refers only to tire pressure
Correct answer
C. The trailer will begin to tip at a lower sideways force or speed in a curve than the tractor will
Why
Drivers cannot judge safe speed by what the tractor feels like doing. The trailer reaches its limit first, often without warning signs the driver can feel in the cab.
Manual topic: Combination Vehicles - Rollover and Rearward Amplification · From the Combination Vehicles practice bank (CV-076).