Stockbridge Damper.

Basically, it keeps the pole from vibrating like a guitar string. The chains are there in case the supporting rod breaks; they keep the heavy weight from going through your windshield.

Traffic light pole truck nuts

I wonder if it's a weight to change the resonance frequency cause it was wobbling too much. Or it's the charging ports for the govt birds

They're the answer to truck nuts. Traffic light ovaries.

That's where the pee is stored

My guess is that those are weights installed as a vibration damper. That explains the chains with which they are secured, and the box with the antenna, which would then record the results of this installation.

Does that traffic light happen to be in a rather windy area, and were those traffic lights swinging madly during storms?

That's how they make new traffic lights.

Those are males

What's the big square antenna thing? Looks like a pretty beefy RF thingy. I've seen them on traffic lights and just by themselves. Are they detecting just the presence of big metal objects? Are they doing long range RFID?

It's a lamp post. Did you expect a scrotum sack, Michael?

Very old shot spotters?

The one on the left is named Dingle McDangle, and the one on the right is named Jingle Bojangle

Light Nuts. They got jealous when they saw truck nuts and, well ...