What specific danger does the sign shown warn of?

Question

DentroTest · Accepted Answer

The sign shown is P-17a, “Road narrowing on the right”: it warns of the proximity of a part of the road where the roadway narrows on the right side (it may also be used when the width of the right shoulder is reduced). Saying that it warns of a speed bump is a mistake: the speed bump is signaled with P-15a, “Speed bump”. And saying that it warns of a longitudinal drop on the right edge is also a mistake: that danger is signaled with P-30, “Lateral drop”.

What specific danger does the sign shown warn of?

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