Considerable worldwide attention has been directed to offset test development because past testing practices did not adequately address the structural integrity of passenger compartments for partial engagement car-tocar crashes or collisions into fixed narrow objects. National Highway Traffic Safety Administration (NHTSA) Research and Development has been conducting offset carto- car and moving deformable barrier testing since the early 1980’s in order to develop a offset test procedure that characterizes the crash environment in which serious injuries are projected to occur in an all airbag fleet. This paper will compare theoretical and actual results from carto- car tests, the European test as used by the Insurance Institute for Highway Safety, and the NHTSA R&D test procedure using the moving deformable barrier.