Ran radar for 25 years, big, small, side mounted, dash mounted, laser, you name it. Bobcat hit it on the head, The radar pickes up the strongest signal which most of the time is the largest surface area. And in close dense traffic this can be problematic for us to figure out what vehicle it is reading. A seasoned cop can cut through the obvious and make a statistically correct decision. A seasoned cop will HOPEFULLY let a possible error go, as there is always another big fish to catch. I did not get hung up on the average "over the speed limit cars". I had a job to do... but there was always a really crazy driver on the road, and that was the one that flew by you when you were giving a ticket out to a mild speeder. Now that pissed me off. I hold the record for recording the fastest speed OVER the posted limit. 108 MPH . I never caught that motorcycle.
Lou