One, it's insane to ask drivers to input data while driving.
Two, these are not "speed traps", they are simply officers on the side of the road. These officers are doing a public service looking for cell phone users, and for aggressive speeders.
I personally have seen them staring through regular binoculars lately more often than a radar gun. I assume they are looking for people holding cell phones. This is in Northern California.
Also, being seen on the freeway at all helps the crazies in their dodge chargers slow donw a little. If they know the cops are out, they'll keep it to 95 instead of 105.
Two, these are not "speed traps", they are simply officers on the side of the road. These officers are doing a public service looking for cell phone users, and for aggressive speeders.