This has nothing to do with improving road safety, more of a revenue raising exercise. Bearing in mind that traffic policing is very low on the list of priorities, as has quite rightly been pointed out, who will enforce these new powers? This is where you'll start to see more powers given to PCSO's and Highways Officers. I have heard that the latter will be given full enforcement powers within the next couple of years, as they are apparently a cheaper option than the police. Bearing in mind the vast amount of money that was spent to create their jobs, provide equipment, training and premises, you can see how this may be an attempt to claw some money back.
Also, will acts of carelessness be clearly defined? Or will they be purely a subjective matter of one person's opinion as to what constitutes careless driving? I can see the courts getting clogged up with motorists who feel unfailry dealt with. I for one would want to see either video or other corroborated evidence if I was accused of driving carelessly. Let's face it, we ALL make minor errors from time to time, for whatever reason. In the majority of instances, this causes nothing more than mild annoyance to others on the road.
Laws regarding standards of driving exist already, although the sentemcing of those convicted of the more serious offences leaves an awful lot to be desired. This proposed scheme appears to be using a sledgehammer to crack a nut, instead of getting a firm grip on courts which impose lax sentences.
Sorry to witter on, but this really will affect all of us, as I wonder how many of those who will be issuing the penalty notices either ride a bike or understand much about them!