Ontario G1 Practice Test · Question
High-beam headlights must be dimmed within how many metres of an oncoming vehicle?
Under the Ontario Highway Traffic Act, drivers must switch their high-beam headlights to low beams when an oncoming vehicle is within 150 metres to prevent blin
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Question: High-beam headlights must be dimmed within how many metres of an oncoming vehicle?
Answer options:
- 50 m
- 100 m ✅ 150 m
- 300 m
Correct answer: 150 m
Explanation: Under the Ontario Highway Traffic Act, drivers must switch their high-beam headlights to low beams when an oncoming vehicle is within 150 metres to prevent blinding the other driver. The incorrect options of 50 and 100 metres are dangerously close, while 300 metres is not the legally mandated distance. Similarly, drivers must dim their high beams within 60 metres when following another vehicle. This specific distance rule is a common question on the G1 rules test, and knowing the distinction between oncoming (150 metres) and following (60 metres) scenarios is essential for exam success and safe night-driving.
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Question explanations
- What does an inverted (upside-down) red and white triangle mean?
- A yellow diamond-shaped sign is used to indicate what?
- What does a circular sign with a red border and diagonal line through a black 'P' indicate?
- You are driving in Edmonton and see a flashing amber light on a school bus. What action must you take?
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