Normally I worked "moving" radar as it allowed me to cover my beat better than "stationary". 99% was opposite-direction radar. By putting the radar in the "hold" mode, no signal was going out for radar detectors. When I’d see a speeder (via experienced estimation), I’d take the radar off "hold", lock their speed in, slow and wait for them to pass, then make a U-turn and pull them over. It wasn’t uncommon to find 75+ speeders. I retired and gave the beat to my successors.