This video is an example of the CHP speed trap I see quite often in my area.
I see the CHP setup at that particular freeway on-ramp all the time, so this morning I decided to start recording before I get on the freeway. Often times I'll get a blip or two of Ka alert (sometimes with 34.7Ka showing) at the initial detection about 3.5 miles away from the LEO. The LEO was targeting motorist traveling in the other direction. I've seen mix results with forward facing detection with my Pro 78se at this speed trap location in the past.