As Bart Simpson once said, "Far be it from me to tell Springfield's top cop how to do his job." But I do have this advice for my local gendarmerie:
You know that speed enforcement zone over on Joppa Rd near Spring Ave? There is such an interesting dynamic there. Actually, make it two interesting dynamics (they're small.) First, now that the radar zone has been in place for so often for so long, everyone who lives in the area knows very well to slow down when approaching that stretch of road from either direction. The problem is that it's a very wide stretch of road in that area, and it tends to make some motorists feel as if they are on the highway, so they hit the gas, scattering pedestrians and Smart Cars in their wake.
Wisely, the police slow them down by setting up enforcement. It's almost Pavlovian now; people get to where the police are usually perching in wait, and they slow down, and then, once they get past that point, it's back to trompin' the pedal. That's dynamic #2...people think the law is back there in the last block, so here we zoom! So, why not have another zone in the next block? Once would-be speeders think it's safe to speed again, then nail 'em a block away.
This could also work for a variety of other crimes. I haven't worked out all the details yet, but I am available for consultation.