The document discusses comparative negligence and liability determination in accidents. It outlines four types of negligence rules used in different states and defines negligence. It provides guidance for investigators on determining liability through investigating statements, evidence and applying concepts like proximate cause, intervening causes and duties owed by various parties. Duties of motorists, passengers and pedestrians are covered along with specific scenarios like intersections, turns and passing. The responsibilities of adjusters to determine, document and negotiate liability are emphasized.