You can look it up on youtube. Good explanation video on there. Basically you have a safety rating and an irating. Keep you safety rating above 4.00 and you'll move up in license. Problem is any wreck that happens loses you safety rating and the other guy safety rating. Fault is not accounted for. Which is fine with me just can be crazy frustrating. So when Killer took out half the field, he might not be the only one who can't drive that car anymore. Lol.