Arbitration please help?

What should I expect from an arbitration ? Some lady did a U-Turn in the middle of the road and hit me, now she's lying saying I tried to go around her while she was trying to turn and then she hit me. I was in the middle turning lane approaching my left turn and she was a little infront of me but in the right lane going straight when she made a left turn(U-Turn) infront of me and ended up hitting me. What can I expect? She's lying, would she still win?