Driver negligence due to fatigue or other types of carelessness is often the basis for a personal injury lawsuit. Negligence is required by law for an injury suit to have merit, in addition to injury and causation. If negligence is involved in an auto accident, then it is almost always the case that the negligent party will be found at fault, and be held liable to pay for all damages. The basis for this rule is that all people are responsible, especially when driving a 3,000 lb car, for their actions and the safety of the people with whom they share the road.