Technology is now being developed to catch speeding motorists without emitting tell-tale radar signals by listening to the doppler shift of the engine sound as it passes.
I don’t know how it copes if the car is accelerating or decelerating at the time but if it works, that’ll put a stop to people avoiding being caught speeding by using radar detectors.
I have absolutely no sympathy for those who complain about speeding fines and cameras. If you don’t want to pay the fines, don’t break the law. It’s not as if the speed limit is a secret.