As I was traveling back to college from my spring break at home I encountered a K band speed sign as I was coming into knoxville, TN. There is a bunch of road work going on on the interstate, so I knew there would be at least one sign up as I came in. I hit the odometer when I got the first signal. The reason I got so much range on the sign was because it was up high near the top of a hill at an exit. When I came to the top of a hill the strength bar increased and as I came to the bottom of a hill the signal decreased. This continued for a whopping 4.2 miles until I reached the sign!! I couldn't believe this. This is the longest range I've gotten on K band ever.