Just advancing through the streets on Google Maps in different directions from the ones you have posted, it appears that is a standard configuration for metering their traffic signal controllers.
I thought at first it might just be legacy downtown installs but I saw some the same way when I randomly looked at signalized intersections in the suburban areas.
If that was here in Winnipeg, the snow plows would take the meter out a few times a year when cleaning the snowplow windrows out of the intersections.
The intersections here are metered, but they use a Midwest pedestal/disconnect most of the time, typically placed in a greenbelt somewhere near the traffic controller.
What's the point of metering equipment with a constant and predictable consumption? The costs of the equipment, its maintenance, reading and billing must be significant. As far as I know, in UK street furniture is paid by local authorities just based on a register of installations, though some places monitor switching times of photo-cell controlled lamps.
Could be a local utility requirement that all services be metered. They may never be read but the spirit of the local requirements are met.
talking about constant and predictable usage I have noticed meters on the billboard signs in my city. I wonder if the local utility or the sign company ever takes a reading off it or do they just estimate/flat rate the sign account.
My guess is they are on an annual plan (AKA budget plan) and they just read the meter once a year to adjust the rate.
These are all on borrowed time tho. I am not sure FPL has any analog meters left around here. All I see is the smart meter that calls home constantly. I can get an amazing amount of information about my usage online.