By harshly punishing drivers you provide a deterrent against the next accident. It makes sure that drivers have both an atruistic reason (preventing an acciden

By harshly punishing drivers you provide a deterrent against the next accident. It makes sure that drivers have both an atruistic reason (preventing an accident) and selfish reason (preventing their license being revoked) to pay attention. Also - banning a driver isn't really a punishment as they'll get to discover how much fun it is to cycle to work and gain the life-long benefits of exercise and a friendly, social, activity :-)