Hmmm a lot depends on who got the ticket. Did you hit him from the rear? If so, you probably got cited for following too close. If he got the ticket and he caused the accident, then you could get a personal injury attorney(not the TV /billboard kind) and sue his insurance company for a bodily injury. If you got the ticket, then you will have to fight it in traffic court. But unless you can prove that he caused the accident, you might not have a leg to stand on. Unfortunately, if you got the ticket, this dude can say he is injured, then your insurance company is liable for payment. Good luck.