Since everyone's talking about how they get different performance in the city due to reflections and low radar gun power, I decided to turn on my trip odometer so I can find out, within reason, the amount of warning I get from signals in the city. So today, I decide to take a back road from the main street because the speed limit is 30 (too low), there are no stop lights, I have encountered cops on that road before, and the road is windy and hilly towards the end and this is where the cops always sit.
As I'm driving, I'm second in line and doing about 35-40 with the guy in front of me. As I approach the end, where I would expect a cop to be, the road, as I said earlier, is a bit of a hill and its also a corner. The hill crests right as it goes around the corner, and then, as you come around the corner, it goes downhill again. This is where the cop normally sits, at the bottom of the hill, about 600-700 feet from around the corner.
Therefore, I've got two obstacles...a corner, and a hill to hinder my warning time.
As I begin to climb the hill, I immediately get a single K alert. I never get falses here so I immediately know that a cop is running radar up ahead. So...I look at my odometer, note the mileage, and slow to 30 mph (meanwhile the car in front of me kept going about 35-40). As I begin to crest the hill and turn the corner, the signal strengthens to about 3-4/9 until its about 8-9/9 a couple seconds before I round the corner and see the cop up ahead. When I pass the cop, my odometer has gone about 3/10 of a mile or about a 1/3 of a mile (hard to tell exactly because I can only measure tenths of a mile).
All in all, I got about a 5-10 second (from seeing the cop), 1/3 mile warning (from passing the cop). I figure I'm going to try to get some video footage of it with my digital camera the next time. Hope it turns out ok.
Does this seem about the right amount of warning to everyone else?