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_______ gives notice to road users of a situation that might not be readily apparent. They are generally diamond-shaped (48" x 48"). Their temporary signs are orange with black lettering while permanent signs are yellow with black lettering.

A. Warning signs
B. Regulatory signs
C. Guide signs
D. Informational signs

Answer :

Final answer:

Warning signs on roads, recognizable by their diamond shape and color schemes, alert drivers to potential hazards or changes in road conditions that might not be immediately apparent.

Explanation:

The signs being referred to in the question are called Warning signs. They are known for their distinct diamond shape and 48" X 48" standard size. Warning signs are designed to alert road users to potential dangers or changes in road conditions that they may not be immediately aware of. The color schemes mentioned, orange with black lettering for temporary signs and yellow with black lettering for more permanent ones, are typical for these signs.

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