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Why do combination vehicles roll over in situations where a car would only skid?
- A.Their high center of gravity means the trailer can tip over before its tires lose grip, especially in a fast turn or sudden swerve
- B.Combination vehicles have narrower tires than cars by law
- C.Rollovers happen only when the fifth wheel is ungreased
- D.A car and a loaded van trailer have the same rollover threshold
Correct answer
A. Their high center of gravity means the trailer can tip over before its tires lose grip, especially in a fast turn or sudden swerve
Why
A tall, heavy trailer leans hard in a turn, and its center of gravity can move outside the support of its wheels. That is why a maneuver that feels mild in the cab can already be tipping the trailer behind you.
Manual topic: Combination Vehicles - Skids and Jackknifing · From the Combination Vehicles practice bank (CV-142).