After ensuring safety and calling 911, you should: (1) Document everything – take photos of all vehicles, the accident scene, road conditions, and visible injuries, (2) Gather information – collect contact and insurance information from all parties and witnesses, (3) Seek immediate medical attention even if you feel fine, as some serious injuries may not be immediately apparent, (4) Avoid admitting fault or making statements about the accident to insurance companies without legal guidance, (5) Preserve evidence – don’t repair your vehicle until photographed and inspected, and (6) Contact an experienced truck accident attorney immediately. Time is critical in truck accident cases because evidence like trucking logs, GPS data, and driver records can be lost or destroyed if not preserved quickly.