Quote Originally Posted by RedRocket View Post
Apply some logic here,it's b/c at the speed of light a couple of feet separation distance is an infinitesimally small amount of time duration to calculate & display w/o using a Cray computer processing power inside your AL-P CPU.
The CPU inside those ALPs is probably more powerful than those inside the Cray-1 were. In any case, a LIDAR gun MUST be able to measure distance accurately or it would never be certified to measure speed. The range accuracy quoted on most guns is +/-6", which is enough to use this method for the parking sensors too.