Ontario Class D Practice Test · Question
Upon encountering a sign displaying '4.2 m' with an arrow pointing down, what is the immediate implication for a Class 3 driver?
A sign indicating '4.2 m' with a downward arrow signifies a low-clearance restriction, meaning the vertical height available is 4.2 metres. Drivers of Class 3 v
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Question: Upon encountering a sign displaying '4.2 m' with an arrow pointing down, what is the immediate implication for a Class 3 driver?
Answer options:
- The maximum permissible speed in a tunnel or underpass is 4.2 km/h. ✅ The minimum vertical clearance ahead is 4.2 metres, requiring attention to vehicle height.
- The maximum vehicle length permitted on the upcoming road section is 4.2 metres.
- The road ahead is a designated truck route only for vehicles taller than 4.2 metres.
Correct answer: The minimum vertical clearance ahead is 4.2 metres, requiring attention to vehicle height.
Explanation: A sign indicating '4.2 m' with a downward arrow signifies a low-clearance restriction, meaning the vertical height available is 4.2 metres. Drivers of Class 3 vehicles must ensure their truck's height does not exceed this limit.
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