Catnao - the following may give you some comfort, in the sense that it could be a lot worse.....
My Ex (shortly before I met him in 2000) fell asleep at the wheel
, causing £5k+ damage to his car.
2 years later, he rear ended someone at traffic lights and wrote that car off (£4000).
2 years after that he reversed into someone at lights (dont even ask). Luckily minimal damage. However a couple of months later he drove the car when it clearly had a mechanical fault, and as a result left the car needing an engine rebuild (£2k).
The following year we had a non fault accident where a bus drove into us and wrote off car.
The year after that (in a new car with parking sensors) he reversed into someone - £500 damage. His excuse was he had turned off the parking sensors because he was listening to a CD!
He had 2 other (fault) accidents before I met him, and had been banned from driving for doing 127mph on the motorway.
He is a crap, inattentive driver (as well as being a total fucking idiot) and I always found being in the car with him an extremely stressful experience which I am glad I no longer have to endure.
I do agree your DH might benefit from advanced driving course. I think they focus on things like attention etc. My Ex however is beyond hope......