What is this on the traffic lights?

[Retroman1969]

Looks like a digital antenna/transmitter.
The most common answer I've seen is that it's a detector that gauges traffic flow and detects emergency lights to coordinate the signal light functions.

[Timco]

Originally Posted by Retroman1969

Looks like a digital antenna/transmitter.
The most common answer I've seen is that it's a detector that gauges traffic flow and detects emergency lights to coordinate the signal light functions.

As a kid we just flashed our lights. Worked great.

[cardiffgiant]

Obviously, some type of mind control device. I've lined the inside of a baseball cap with tin foil for just the occassion.

[CoBeerToad]

I still miss Lawton OK for this reason. The speed limit on most of the main roads was 45, but the entire town's lights were timed for 37 mph. You could drive from one end of town to the other without stopping and nobody sped. I don't get that this is that hard or expensive to set up.