Ontario G1 Practice Test · Question
Drugs (including legal medication) can affect driving by:
Under Ontario’s Highway Traffic Act, driving impaired by any substance, including legal prescription or over-the-counter medications, is strictly prohibited. Th
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Question: Drugs (including legal medication) can affect driving by:
Answer options:
- Improving reaction ✅ Causing drowsiness, blurred vision or slow reactions
- Helping focus
- No effect
Correct answer: Causing drowsiness, blurred vision or slow reactions
Explanation: Under Ontario’s Highway Traffic Act, driving impaired by any substance, including legal prescription or over-the-counter medications, is strictly prohibited. The correct option is accurate because many medications carry side effects such as drowsiness, blurred vision, and slowed reaction times, which severely compromise a driver's ability to operate a vehicle safely. The incorrect options are false because drugs do not improve reaction times or focus, and they certainly have a measurable effect on performance. For the G1 exam, it is crucial to remember that legal drugs can impair driving just as much as alcohol, a key concept often tested on the knowledge exam.
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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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