Earlier quoted context omitted.
If speeding is not something that happens constantly, then a radar could detect the instances of speeding, and only turn on a camera when a speeding car is nearby. This would keep the majority of passing cars from being recorded, and would record the fewer cars the fewer drivers would be speeding.
How long until the AI estimates how fast you were going based on the time you were tagged at 2 cameras? The system says travel between these cameras should take 3 minutes. You made it in 2:45. No review, just a ticket in the mail.
You don't even need AI for this. Its pretty basic.
It is similar to how air enforced speed limits are done. They just paint two lines on the highway. A plane overhead times your car between the lines.