Ok, well i was on a residential road. I have a Police Scanner, and I heared that a van possibly crashed into some bushes near a store and may have taken off. So i figured i would go over there to see what is up and test my Pro 78 as well.
Well I am approaching an intersection where the cop should be near. I am about 200 feet from the intersection and a cop, on the other road driving perpendicular to me, goes by nice and slow. No alert on my Whislter Pro 78. So then I turn so i am driving behind him. As i start to turn i get a Ka band warning of about 3-4 and about 4-5 car lengths behind him. So he DID have his radar on.
My question is all radar detectors in general and also specific ones. I assume the reason it didn't pick up was being at that extreme of an angle, the radar just had nothing to bounce off of into the RD. Has anyone here had a similar encounter with this detector or another one of higher quality (V1, Escort 9500i, etc) that was able to/not able to detect this sort of encounter?
I assume it isn't that much of a big deal for two reasons.
One, I cannot use or rate a radar detector as a cop detector. I can't be running stop signs, running red lights, and other stupid things like that and rely on the radar detector to detect a cop, whether his radar detector is on or not. I have to assume that when I talk about and rate radar detectors, it is for avoiding SPEEDING TICKETS ONLY. Nothing else. I cannot say a radar detector is bad due to me getting a ticket for something other than speeding.
So that brings me to my second reason. A cop is not going to sit on the side of the road and point his radar gun perpendicular to the road. Sure this is GREAT cover for him in the day and especially at night. One problem is the cosine effect. If he is clocking ppl at that much of an angle he is going to get a reading of 0 mph most likely, considering the car would not be approaching nor moving away from the radar.
So I assume that if a detector cannot detect a cop at a 90 degree angle, then you are safe because he couldn't clock you anyways. If you are using ur detector as a cop detector to do other various traffic law breaking, a radar detector could detect a cop when it is too late due to his position to the RD, and worse, not detect at all due to him not having it on!
I also assume that it also depends on the situation, but this has happened before a couple of other times. one was at an actual intersection with traffic lights and another was similar to this one but he was not moving. Many factors can contribute to a detector being able to detect a radar source or not.
Anyone Else's thoughts on this subject?