What specifically does this danger warning sign (P-13b) indicate?

Question

DentroTest · Accepted Answer

This is sign P-13b. It warns of danger due to the proximity of a dangerous curve to the left. Upon seeing it, you must reduce your speed before entering the curve and stick to the right edge of the road to avoid drifting into the opposite lane due to centrifugal force. Why other options are wrong: It is not a narrowing of the road (that would be sign P-17). It does not indicate dangerous curves in plural (a succession of bends), as signs P-14a or P-14b would be used for that. This sign refers to a single curve.

What specifically does this danger warning sign (P-13b) indicate?

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