A team from MIT’s Human Systems Laboratory designed the locomotive HUD as a wide field of view augmented reality head-up display (AR-HUD). The technical feasibility of an AR-HUD was assessed through literature review and hardware tests. To study human factors issues, an AR-HUD prototype was designed, reviewed by experienced engineers, then implemented in the FRA Cab Technology Integration Laboratory simulator. The engineers’ behavior was not significantly altered and using the AR-HUD reduced the time spent looking away from the forward view. Subjective feedback from the engineers confirmed the acceptability and potential benefit of using HUDs.