Yes, that was my immediate thought also and same reaction. :confused2:
Yes, because microwave bands used for police radar are governed, regulated and licensed by federal agency(s) FCC for one). Besides, laser speed measurements are the most common ones around here in Michigan because the aim point is more accurate to target a suspected speeding vehicle.
Now, here in Michigan, many roads designated at 30 mph are gravel roads, so I may have presumed your road is gravel/dirt. My mistake. Gravel roads are county and state regulated. So, less jurisdictional weight. 'speed bumps' or washboarding on gravel roads is a naturally occurring process caused by braking of cars and trucks, so who's to say who 'caused' a speed bump to appear. Works very well on my road. The neighbor's hub cap collection was growing for a while but has now settled down (speed and alloy wheels).
But its your science project. You seem to presume that your speedsters are all equipped with radar detectors. I'd bet they are not. Otherwise get a sheriff out their for a few days a month to ticket the guilty. Don't be surprised if your neighbors fall into the trap, though.
"For police radar you need to have an FCC license to operate. For LEO's this is covered by their license to use public safety radio bands. I'm not sure how a non LEO could get around that as they are not allowed to use public safety bands and the radar bands (K, X, Ka, etc) are all partitioned for LEO use.
Laser on the other hand has no licensing issues."