Document presents development of traumatic brain injury risk functions for frontal crash assessment. Brain strain-based injury risk functions were developed using human and non-human primate injury data from experimental studies, calculated using finite element brain models. Kinematics-based injury risk functions were derived by converting strain-based functions using correlations with head rotational kinematics metrics. Injury risk functions were developed for each kinematics-based metric selected through correlation analysis with maximum principal strain in brain tissue.