Which colours do most warning signs have?

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Dangerous curve ahead (A1)
The sign indicates a dangerous curve and its direction.

Uneven road ahead (A8)
The sign indicates bumps or damage to the road which make it appropriate to travel at a lower speed than what would otherwise be the case.

Falling rocks or debris ahead (A12)
The sign indicates a risk of falling rocks and that there may be fallen rocks on the road. The symbol is adapted to the conditions of the location.

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