Ontario G1 Practice Test
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Passing target: 16 correct signs and 16 correct rules (TLA practice targets)
When following another vehicle from behind at night, at what distance must you dim your high beams to low beams?
A night road has blue A following silver B in the same lane. The upper panel is a scaled ground overview. The lower panel enlarges the same vehicles, with spacing explicitly not to scale. The distance threshold is not shown before answering.
Correct answer: Within 60 metres
Why
When approaching a vehicle from the rear, you must switch your high beams to low beams when you are within 60 metres, so the glare does not blind the driver through their rearview mirrors.
Verified against The Official Ministry of Transportation (MTO) Driver’s Handbook · Night, weather, skids, vehicle failures and collisions · p. 93, 103
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