Correct answer
A steep gradient.
It warns of a steep descent. The sign is P-16a, not P-16b for a climb. The 10% expresses the downhill gradient relative to the horizontal: approximately 10 metres of height change per 100 horizontal metres. It does not indicate a poor road surface or a lateral step. Adapt speed and vehicle control to the descent.
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Road surface in poor condition.
A steep gradient.
A side step.
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Sign P-16A: a steep downhill gradient
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