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Wisconsin DOT says purple-colored street lights are a manufacturing defect
Why are streetlights on the highway purple?
Purple street lights in Tallahassee: Defect leads to distracted drivers
Why are streetlights on the highway purple?
Streetlights in Springfield are turning purple. Here's why.
Why some streetlights are purple in Green Bay, Oshkosh, Wausau
Why streetlights on Milwaukee interstates, highways are purple
Purple street lights in Tallahassee: Defect leads to distracted drivers
Work to begin in March to remove more purple streetlights on Milwaukee highways
1,646 Wisconsin Highway Images, Stock Photos, 3D objects, & Vectors
Why the purple street lights? : r/Austin
Work to begin in March to remove more purple streetlights on Milwaukee highways
Why the purple street lights? : r/Austin
Do you know why some Milwaukee highway and interstate lights are purple?
Why Are Some US Street Lights Turning Purple? - Foundation for Economic Education