I wish I had a video cam so I could have gotten a video of this. Last night, I was coming home from playing tennis. If you take a look at this map, you can get an idea of the range....
As soon as I turned onto richmond road south from cannon road I started picking up a k-band ahead signal on my v1. I drove south and wondered where the heck the cop was hiding. (Please keep in mind this road is very very "hilly".) Finally when I reached the railroad tracks, I passed the cop using K-band constant on moving radar.
I measured the distance on the map between where I first encountered the signal to where I passed the cop and it was 2.25 miles. Now keep in mind the cop was coming towards me in the opposite lane, so presumably, he was moving the whole time himself... so in the time it took me to traverse 2.25 miles at 35mph, I'm assuming he would traverse a similar distance.. which means the original signal i was picking up may have been as far as 4.5 miles!!!