Ontario G1 Knowledge Test — G1 Practice Question
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Accuracy —
Rules of the Road
To prevent whiplash injury in a rear-end collision, your headrest should be adjusted so that:
Show Answer & Explanation
Correct Answer: A. The top is at or above the top of your ears
A headrest below the top of the ears fails to catch the head in rear-end impact, allowing the neck to hyperextend — the whiplash mechanism. The top of the headrest should reach ear level or higher.
Why the other answers are wrong
- B.The bottom is at your shouldersToo low to prevent whiplash.
- C.It rests against the back of your neckContact at driving is not required; position matters at impact.
- D.It is as low as possibleLow headrests are a known whiplash risk factor.
