I have had my R3 installed for a couple months now and I've had a photo radar experience (happened twice), where I don't know what's happening. I see a photo radar vehicle on the side of the road and get no alert from my R3 as a approach or pass the vehicle. I see the operator and the photo radar equipment in the vehicle. I still have everything enabled on the R3, because I in the process of figuring out what I can turn off. Do these guys sit with the photo radar system off, acting like a placebo? Traffic could clearly see them and braking ahead of me occurred in both situations.