Homer Watson and Ottawa Three Lane Roundabouts

[The85]

Pretty sure they are not lights. They are just shields to prevent the accumulation of snow.  They have them at Franklin/Pinebush too. I wondered what they were so took a look and they're just inert shields.

They are not lights. These fins are only  used on single mount gantry signs for wind loading. The MTO's single mount gantry on Highway 8 West for the Weber Street exit also has them. They are not used on double mount overhead gantries as the double support can better withstand high winds.