If you are involved in a trucking crash, it is important to take steps to preserve evidence in order to help prove what happened and who may be at fault. Here are some steps you can take:

1. Take photographs or video of the scene: Document the damage to your vehicle, the location of the vehicles, and any other relevant details of the scene, such as skid marks or traffic signs.

2. Get the contact information of any witnesses: If there are any witnesses to the crash, get their names, addresses, and phone numbers. They may be able to provide valuable information about what happened.

3. Get a copy of the police report: The police report may contain important information about the crash, including the names of the parties involved, the circumstances of the crash, and the officer's assessment of fault.

4. Gather any other relevant documents: This may include your insurance documents, the truck driver's insurance information, and any receipts or bills related to the crash.

5. Do not dispose of your vehicle: Do not have your vehicle repaired until after an investigation has been completed. If your vehicle is damaged beyond repair, make sure to take photographs of the damage before it is disposed of.

6. Seek medical attention: If you are injured in the crash, it is important to seek medical attention as soon as possible. Keep track of your medical bills and any other documents related to your treatment.

By taking these steps, you can help preserve evidence and protect your rights following a trucking crash.