A system is disclosed for reducing the likelihood of vehicle accidents, particularly accidents involving large commercial vehicles, such as aircraft. The system includes one or more wearable electronic devices worn by a vehicle operator, such as a pilot. Physiological emotional data is measured by the wearable device(s) and transmitted to a computing cloud or other computing device for analysis and comparison with a predictive model for indicating the emotional state of the operator. When an unsafe emotional state is detected, an alarm notification is generated and transmitted to an appropriate group of users for resolution.