You can sue any party whose negligence was to blame for the truck accident that caused you to suffer serious injuries. If the truck driver was at fault, you can sue him or her individually, and if they were operating within the scope of their employment at the time of the crash, you can also sue the trucking company that employed them. Other liable parties could potentially include other motorists, maintenance crews responsible for upkeep of the truck, manufacturers that sold the truck with a defective part, road construction crews that created an unreasonable driving hazard, and more.