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What are the Ontario clearance limits for underpasses?

  1. 3.50 metres

  2. 4.00 metres

  3. 4.15 metres

  4. 4.50 metres

The correct answer is: 4.15 metres

Ontario clearance limits for underpasses are typically set at 4.15 metres. Option A is incorrect because 3.50 metres would not provide enough clearance for most commercial vehicles. Option B is incorrect because it is slightly lower than the standard clearance limit. Option D is too high, as 4.50 metres may be unnecessary and more costly to construct. Therefore, the best answer is C, which falls within the recommended range for clearance limits in Ontario.