Why streetlights on Milwaukee interstates, highways are purple

What's Up with the Purple Street Lights?

Purple street lights in Tallahassee: Defect leads to distracted drivers

LED mystery: Why are some county streetlights turning bright purple?

Why Faulty Streetlights Are Turning Cities Purple — and Why It's Worrisome

Why the purple street lights? : r/Austin

Curved road night hi-res stock photography and images - Page 7 - Alamy

Crashes Still Slow Wisconsin Freeways, So Some Planners Push For 'Smarter' Roads

About Those Purple Street Lights On The Roads (Have You Seen Them?) - Your Mileage May Vary

Curved road night hi-res stock photography and images - Page 7 - Alamy

WisDOT: Manufacturer defect causes purple-blue lights on highway

Milwaukee downtown night winter hi-res stock photography and images - Alamy

Why some street lights on I-93 — and around Boston — are bright purple - The Boston Globe