Why You Need a Semi Truck Accident Attorney A semi truck accident lawyer could be required if you or someone you love has been injured in a collision with a truck. Because these accidents are so individual, you'll need someone who is familiar with the specific laws and regulations applicable to commercial trucks. Accidents involving trucks can result in liability for many parties including the trucking company the driver, the manufacturer and many others. A competent lawyer will be competent to assist you in navigating these legal pitfalls an