It just occurred to me earlier tonight that POP radar is absolutely useless. The manual for the POP guns specifically says not to write tickets in that mode, and if one is written, it would not hold up in court. A cop who knows what he's doing with instant-on radar is far more effective than one using POP, because the one using POP still has to go into instant-on to write the ticket. So what's the point?
The only situation where I can envision POP being of any use is for an officer who's surveying traffic from above and using POP to avoid giving people using crappy detectors advance warning of the instant-on before nailing them, but can't most officers tell just by eyeballing traffic who's going the speed limit and who's flying past it?
Why does POP exist?