The other thing is that are a lot of folk with cars who patently don't like driving, have no passion for it and only own a car out of necessity - and so essentially are shit at it!
It's no coincidence, therefore, that these are usually the folk who are selfish, inconsiderate, inattentive and indecisive behind the wheel, guilty of the stupidity that pisses everyone else off!!
So how do we cure the problem?
Simple. Sell cars/issue licences ONLY to 'proper drivers' [a suitably rigorous test would be required to prove this]: folk with a real passion for both DRIVING and cars, and who qualify as proficient and considerate drivers on the road, and ban the rest of the fannies. JOB DONE - and you've cured the traffic congestion problem at a stroke!!
Marco.