How Many, How Bad and Where
Below you will see two charts.
The first chart represents the data collected when the vehicle was travelling at its fastest speed.
The concept/principle of the sign is to show the driver their speed and if that driver is going over the speed limit, that they should adjust their speed accordingly.
And so, the second chart represents the data collected when the vehicle was travelling at its slowest speed. It is expected to see a very distinct drop in the percentage of vehicles going over the speed limit and/or the percentage of vehicles having reduced their speed.
More emphasis should be drawn to the second chart, as any vehicles going over the speed limit at this point probably would not have adjusted their speed enough or accordingly, as a result of the driver feedback sign and perhaps other speed behaviour adjustments need to be taken (e.g. mobile photo enforcement).
With the second chart, if you notice a particular Site ID (shown along the bottom of the chart) has an unusually high percentage of vehicles still going over the speed limit, then with that Site ID, you can go to the map that follows and look up where that driver feedback sign is located (by using the filter for the map). For those with school aged children, you may want to take note on if this driver feedback sign monitors and collects data from a road that runs along the school property of where your child attends school.