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Yellow diamond with a black upward arrow above a small white SPEED LIMIT 45 plaque
MUTCD
W3-5
Category
warning
Color
yellow
Shape
diamond

Reduced Speed Limit Ahead

The posted speed limit is about to drop to the value shown.

Gives advance notice that the legal speed limit will decrease ahead. Begin slowing now so your speed is at or below the new limit by the time you reach the regulatory speed-limit sign that follows.

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