No, but I assume most can read the numbers? People are good at seeing patterns. The countdown timers seem well-established so people know what they are. The d

No, but I assume most can read the numbers? People are good at seeing patterns. The countdown timers seem well-established so people know what they are. The decibel meter is probably something people will figure out quickly (number goes up when noise goes up). The reset is something people will definitely figure out quickly - bottom number goes over 85, countdown resets. Are there no fines for ignoring traffic lights? Since this is deployed to only a few traffic lights, seems like handing out a bunch of fines to everyone ignoring the light once or twice should be enough for a sufficient number of drivers to stop ignoring it.