Ontario G1 Knowledge Test — G1 Practice Question
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Accuracy —
Rules of the Road
When approaching an oncoming vehicle at night, you must switch from high beams to low beams at a distance of at least:
Show Answer & Explanation
Correct Answer: C. 150 metres
High beams blind oncoming drivers and cause temporary vision loss that can last several seconds. The 150-metre switch distance allows time for the oncoming driver to still see the road ahead. Similar rules apply at 60 metres when following another vehicle.
Why the other answers are wrong
- A.30 metres30 m is too close — still blinding.
- B.60 metres60 m is the following-another-vehicle rule, not oncoming.
- D.500 metres500 m is farther than required; earlier switching is courteous but not mandated.