Federal and state law requires the businesses operating commercial vehicles maintain records of their driver's activities for amount of time. This also includes driver log books and background information, or pos video rape or black box that records the vital events relating to the accident. For this it is important that you contact an attorney that knows the law and can secure these before they become unavailable.

Due to the severity of injury or possibly fatality when an injury occurs involving a commercial vehicle you should act quickly to secure your rights.  The commercial company and its adjusters go to work immediately to limit their liability.  This means they will try to settle as quick and cheap as possible.  In addition they will start work immediately to prove that you were not responsible and find loopholes in your case. Do not sign anything or make any statements to the insurance company until you have the opportunity to talk to a lawyer.