Ontario G1 Knowledge Test — G1 Practice Question
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Accuracy —
Rules of the Road
When towing a trailer, your side mirrors must:
Show Answer & Explanation
Correct Answer: B. Be extended or supplemented so you can see past the trailer
A trailer wider than the tow vehicle blocks the standard side-mirror view. Extended (tow) mirrors let you see behind and beside the trailer — crucial for lane changes and merging.
Why the other answers are wrong
- A.Be the standard vehicle mirrors onlyStandard mirrors leave blind spots larger than the trailer.
- C.Be folded inFolded mirrors are useless.
- D.Face downwardDownward-aimed mirrors miss side traffic.