Why dozens of street lights on 2 major Calgary roads are turning blue (or purple)

The province says 70 street lights illuminating Stoney Trail and Deerfoot Trail are turning blue (or purple) due to a manufacturing defect — and it has no plans to replace them.

Why Vancouver street lights are purple: city

traffic, News

Dark Sky Consulting Blog - DARK SKY CONSULTING, LLC

Winnipeg working to replace purple street lights

Red Deer raid nets $2.2M in drugs as well as 9 guns

Hard on the eyes': Defective streetlights on some Calgary roadways have drivers blue, blue lights

Operational and safety improvements project

Red Deer raid nets $2.2M in drugs as well as 9 guns

Variations in traffic light operation - Wikipedia