A small rectangular plate showing a number like "40" is posted directly under a curve warning sign. What is it telling you?

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Correct answer: C. The recommended maximum safe speed for the curve ahead

This is an advisory speed tab — it recommends the maximum safe speed for the curve or condition ahead. It's advisory, not a posted legal limit, but ignoring it on a genuinely sharp curve is exactly how drivers lose control.

Source: MTO Driver's Handbook: Ontario Traffic Manual, Book 6 — Advisory speed tab

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Study the rules first in the Warning Signs guide, or browse all free G1 questions.