"Cognition/ Information Processing." . . "Velocity/ Speed." . . "Collision Prevention/ Collision Avoidance." . . . . . . . "Evaluation of safety improvements at highway-railway grade crossings"@en . . . . . . . . . . "Evaluation of safety improvements at highway-railway grade crossings. Interim report"@en . . . . . "Evaluation of safety improvements at highway-railway grade crossings : interim report" . . . . . . . "Flashing Signals." . . "Railway Crossings." . . . . "Green." . . "Effectiveness." . . "Cameras." . . "Controlled Signals." . . "Warning Signs/ Warning Signals." . .