I was in trucking for many years and the one thing trucking company's don't want is the D.O.T. showing up at their company ! I would call the trucking Co. and talk to the head of their safety dept. not a dispatcher and tell him you are going to contact the D.O.T. because of their company's unsafe driver and that after the tire exploded the driver just kept on going not caring if anyone or anything was hurt and that you called the Co. and they knew about the incident and never did anything about it. It's worth a try. Without the D.O.T. and no police report I don't think you have any chance at all. Good luck.