Question 46 of 140

What is the key difference between off-tracking and the rearward amplification (trailer sway) sometimes seen in combination vehicles?

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Off-tracking only happens at high highway speed, while rearward amplification only happens when the vehicle is parked overnight
Off-tracking is a steady geometric effect of turning, while rearward amplification is a dynamic side-to-side motion that builds up from sudden steering
They are two names for the exact same effect
Rearward amplification is caused by tire pressure, while off-tracking is caused by weather

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Correct answer to question 46 (Combination Vehicles): Off-tracking is a steady geometric effect of turning, while rearward amplification is a dynamic side-to-side motion that builds up from sudden steering

Why

Off-tracking is simply the geometry of the rear wheels cutting a tighter path in a turn, while rearward amplification is a separate, dynamic swinging motion that can build from a sudden steering input, and the two shouldn't be confused.

Updated: November 2026

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What is the key difference between off-tracking and the rearward amplification (trailer sway) sometimes seen in combination vehicles?

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