My take on it is this, there are good and bad in all ages, all personalities is all areas of the country. Day in day out I see people hogging the middle lane, or cutting across 2-3 lanes on a roundabout, I don't think they understand that you can actually go all the way around a round about if you miss your exit and try again..
I would say the bigger issue here is the way in which people are educated. Re-testing of people is not viable. It would cost too much and force people off the road which I don't think is right. A lot of OAP's are single and a car is their way of getting their shopping home, it gives them that bit of freedom they require to still act as a human in society.
My grandfather is very aware that he cannot react the way he used to, he is also aware of the volume of traffic on the road. His car is now used to take him to the local shops and to drop my grandmother to the hair-dressers. Thats it.. He will not venture into Swansea let alone on the motorway because he knows he is not up to it..
I think that police should be set target areas to work on, day in day out on the motorway I see some horrific stuff, to the point of people using hard shoulders and undertaking.. I think that in theory the motorway is the simplest method of driving, your in the inside lane, your check mirrors, signal, move out, overtake, mirrors, back in... All the traffic is going in the same direction and this method allows you to build up a picture of what is going on all around you, keeping you more aware of what is going on. I cannot understand on an empty road, in the middle of the night, why anyone would think the middle lane is the lane of options.. Even more so when you hit roads like the M42/A42 where they continue in the outside lane..
I think if basic motorway education was given then the whole traffic network would function far better as people would not be held up by those hogging middle and outside lanes, normally at slower that national speed limit...