My thought is that this is a tough problem to solve. I think looking for solutions is good though, because clearly what we are doing now could be improved. No matter what direction we look at this from, improvements would be welcome.My thought is that even having the arbitarty limit means that some after-the-fact incident must occur to trigger the search. If nothing wrong is happening, then there is no probable cause to check the driver. So the performance is still really at issue.
It's a tough one, that's for sure.