Had a Lidar encounter yesterday and now I am wondering if there is a minimum distance at which Lidar can be reliable used by Law Enforcement? There is a downhill section on Dunwoody Club Drive where a subdivision entrance is on the right side in a curve that is bending to the right. The Dunwoody PD was sitting in the subdivision entrance about 20 to 25 feet back from the intersection of Dunwoody Club. Since the road is down hill and curving in, he sees you before you can see him due to his being back away from the road. The LEO can see you when you are about 20 feet (A squared) from the subdivision entrance and with him back about 20 to 25 feet (B squared), the slant distance has to be about 26 to 32 feet give or take from the mean of 28 feet (C squared). Can TruSpeed S and Dragon clock and lock reliably given that short operational distance and increasing angle to perpendicular? Drawing it out on paper, it looks like the LEO has all of 5 to 8 feet before he can no longer hit the front tag, bumper, or headlight areas and would be shooting the side of the vehicle as one passed the entrance.