Why You Need a Semi Truck Accident Attorney A semi truck accident attorney could be required if you or someone loved ones has been injured in a truck crash. Because these incidents are individual, you'll need someone who is knowledgeable about the specific laws and regulations applicable to commercial trucks. Truck accidents can create liability for a variety of parties including the trucking firm driver, manufacturer, and others. A skilled lawyer will be in a position to guide you through these legal pitfalls and ensure that you receive the