In order to qualify for an 18 wheeler accident lawsuit, you must be able to prove that the truck driver or the trucking company was at fault for the accident. There are a few different ways that you can do this. First, you will need to gather evidence from the scene of the accident. This can include things like photographs of the accident, witness statements, and police reports. You will also need to get your own medical records to show that you were injured in the accident. Once you have this evidence, you will need to find a lawyer who specializes in 18 wheeler accidents to help you file your lawsuit.