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The National Highway Traffic Safety Administration (NHTSA) is conducting a research program to investigate the use of the 40 percent offset deformable barrier (ODB) crash test procedure to reduce death and injury, in particular debilitating lower extremity injuries in frontal offset collisions. This paper presents the results of 22 ODB crash tests conducted with 50th percentile male and 5th percentile female Hybrid III (HIII) dummies fitted with advanced lower legs, Thor-Lx/HIIIr and Thor-FLx/HIIIr, to assess the potential for debilitating and costly lower limb injuries. This paper also begins to investigate the implications that the ODB test procedure may have for fleet compatibility by evaluating the results from vehicle-to-vehicle crash tests.

This paper provides an update of NHTSA's research activities in vehicle compatibility and aggressivity. This paper pres ents new ly initiated efforts underw ay to develop test assessment meth odologie s intende d to evalua te vehic le compatibility. The rigid barrier load cell data collected from 18 years of the agency's New Car Assessment Program testing are reviewed to e valuate potentia l test measures that may be used to evaluate a vehic le's compatibility in vehicle-to-vehicle crashes. These parameters are then evaluated using a series of vehicle-to-vehic le and m oving deformable ba rrier (MDB)-to -veh icle tests. In these tests, the face of the MDB has been instrumented with an array of load cells to compute test measures. This study is part of NHTSA's ongoing compatib ility research program and is being coordinated with the IHRA compatibility group.