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Why are blue lights installed on traffic signs?

Summary by Mankato Free Press
Question: I’m wondering about a light that seems to only be on at night on the traffic lights. It’s a small purple or blueish light that’s near the traffic lights. I’ve tried to figure out what its use is or…

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Mankato Free PressMankato Free Press

Why are blue lights installed on traffic signs?

Question: I’m wondering about a light that seems to only be on at night on the traffic lights. It’s a small purple or blueish light that’s near the traffic lights. I’ve tried to figure out what its use is or…

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Mankato Free Press broke the news in on Saturday, January 18, 2025.
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Mankato, Minnesota

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