Since when is getting a ticket for something definitive proof of fault?

Dan could've flipped the b itch with room to spare, and the minivan driver was eating mcdonalds and adjusting the radio and as a result didn't brake and caused the accident.

Also, Dan could've misjudged it and actually been at-fault.

Who's to know? Dan got the ticket because no legal system can possibly deal with "well I saw her adjusting her radio (not looking at the road) so it's her fault".