Correct answer
The percentage of incline relative to the horizontal.
On vertical danger signs for slopes, the number accompanying the sign indicates the percentage of incline or gradient the road will have compared to the horizontal. It will never indicate the speed at which you must drive on that slope.
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The maximum speed at which you can drive on this slope.
The percentage of incline relative to the horizontal.
The minimum speed at which you can drive on this slope.
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