Here's what I don't understand about speed cameras. The state can set up a box by the road with a radar gun and a camera inside and use it to detect speeding cars. Then they can mail a ticket to the owner of the car.
So why do cops have to bother pulling you over to write a ticket? Why not just give them a radar gun with a digital camera mounted to it and let them snap photos as you whiz by? Saves everyone involved time.
A semi-related question regarding traffic stops... I've personally been in the car twice, once in MD and once in IN, when the police have falsely claimed a tail light was out. Is there any jurisdiction that requires police to document such claims, say by taking a picture? A digital point-and-shoot would be a drop in the bucket, cost-wise, compared to the rest of the kit in a police cruiser.
I suppose it wouldn't really do much good since the cops would just shift their bogus explanations to something they didn't have to document, like "driving erratically."