This is an IT news website, right?
I'm slightly surprised at the number of comments in favour of de-automating the simple process of catching people exceeding the speed limit. Perhaps we should also return to paper-based filing systems and switch off all these pesky computers?
I would much rather rely on an impartial camera with well sign-posted speed limits than a disgruntled traffic cop using "discretion" to turn a blind eye to local vehicles and concentrating on those passing through, or driving while black, or motorcyclists or any other group that might be a target.
As for concentrating on catching rapists and murderers, more people are injured or killed on the roads than are raped or murdered, so using speed cameras frees up police resources to concentrate on these heinous crimes, while raising money from the criminally stupid. It isn't that difficult to keep your speed down...