I agree that people who drive commercial vehicles are and should be held to a higher standard. But they can't defy the laws of physics either. And accidents happen. I am sure that there will be an investigation and if warranted tickets issued - I assume that he was at least field sobriety tested, if not blood/breath tested. Hopefully the driver was 100% sober too. Fines aren't final unless there is a court hearing or the person agrees to pay it (which means admitting guilt or no lo contendre). Lose a CDL over one accident and event, doubtful. But I have no idea of knowing this person's driver history.