The proposed project aims to develop and test an intensive rehabilitative technology aimed at enhancing emotion regulation and reducing operator-related risk during civilian driving in OEF/OIF returnees burdened by severe driving-related distress and disability. This in-car technology will have two main components. The first is a system for measuring driving behavior (accelerator and steering wheel movements, lateral and longitudinal vehicle accelerations), visual attentional control, and autonomic arousal during actual driving. The second is a cognitive-behavioral intervention combining breathing retraining/heart rate variability biofeedback and cognitive reappraisal. Both components are compatible with on-road driving assessments currently performed by certified driving rehabilitation specialists (CDRS) at the VA Palo Alto Health Care System (VAPAHCS) on neurologically intact patients and those with mildto- moderate non-focal traumatic brain injury.