Originally Posted by tabetha

99% record on disc, a few older ones record on VHS, so quality is not so good.
The device needs 1/700th of a second to establish your speed, the camera is auto focus as quick as you can move it, it focuses.
They can get you whether moving towards or away, the X only needs to be on any part of the car, it will get a cycle in front of an artic with perfect precision.
They take set up shots, this is done by pointing at a nearby stationary object, aensuring it reads zero speed.
They could read the small print on the bottom of a number plate at 1/4 mile without any problem at all.
They record and wipe all the time, if any offence is seen the save button, a red square is pressed.
Next time you see one ask the operator to explain it to you, most are only too glad.
tabetha