It could be more effective if it had Cameras and could see the traffic volumes (and your license plates of course)
Why do you think it doesn’t have cameras and license plate readers? Remember the at that time fiction TV show “Person of Interest” from a couple of years ago? If Hollywood writers can think of it I suspect Google engineers have thought of it too.
“It could be more effective if it had Cameras and could see the traffic volume”
With the ubiquity of cameras on traffic lights, I’d be very surprised if it DOES NOT have that data. Plus the data from the vehicle sensor coils embedded in the pavement at every intersection.