Transportation Technology Center, Inc. (TTCI), a wholly owned subsidiary of the Association of American Railroads (AAR), has conducted three full-scale locomotive crashworthiness tests on behalf of the Federal Railroad Administration (FRA) at the FRA’s Transportation Technology Center (TTC), Pueblo Colorado. This paper describes the second and third Phase I tests. The previous test involved a locomotive striking a standing string of hopper cars. The second full-scale locomotive impact test was performed September 10, 2002. The test involved one SD-45 locomotive, modified to meet AAR Specification S-580, and three trailing loaded hopper cars impacting a stationary log truck at a grade crossing at 50.4 mph. A third full-scale impact test, conducted December 18, 2002, involved a locomotive impacting a highway truck loaded with two steel coils on a grade crossing at approximately 58 mph. The rearmost steel coil was aligned with the right side collision post of the locomotive. An anthropomorphic test device (ATD, or test dummy) was placed seated on the floor in the nose of the locomotive, facing rearward with its back against the interior door.