This and the cost of deployment. Police, for all their foiles and failings are capable of judging a situation as another human would. Thus they can use their di

This and the cost of deployment. Police, for all their foiles and failings are capable of judging a situation as another human would. Thus they can use their discretion in handing out tickets. Simple fact is that speeding is not that much of a problem. Certainly people do it and it's dangerous, but most people obey speed limits within acceptable parameters and drive fairly safely. Present levels of speed enforcement are doing their job and greater levels would have a point of diminishing returns.