Determining whether restraint systems were used in an accident is an important task of the field accident investigator. Restraint systems protect people by causing the forces which must be applied to the person in a collision of a particular value of to be applied to stronger parts of the anatomy over a longer period of time, and by helping to prevent ejection. Restraint use may cause characteristic changes in the vehicle at the mounting points, in the retractor mechanism, the restraint system hardware, and the webbing. Occupant Injuries will reflect altered occupant kinematics and altered load application areas when restraints are used.
Charles A. Moffatt, Edward A. Moffatt, Ted R. Weiman
SAE International Congress and Exposition
Reconstruction of Motor Vehicle Accidents-A Technical Compendium-PT-34, Advances in Belt Restraint Systems-Design, Performance and Usage-P-141, SAE 1984 Transactions-V93-84, Seat Belts: The Development of An Essential Safety Feature-PT-92