R.H. wrote:

"Motorists have been noticing an increasing number of intersections where
camera-like devices have been mounted pointing down at traffic. The units
which are not really cameras and do not video anything are highly sensitive
optic detectors used to control the traffic signals."

They probably could just switch the software and use them to see the traffic
but it sounds like they aren't set up for that presently.

George Orwell's singing, "1984 here I come, doo dah, doo dah!"

R