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Runway edge lights are white, transitioning to amber near the departure end of the runway. The ends, or thresholds, of the runways have green lights at the âbeginningâ of the runway, or approach end. The departure end is marked by red lights delineating the end of operational pavement.
Embedded in the pavement of runways and taxiways, the lights automatically turn red when other traffic makes it dangerous to enter, cross, or begin takeoff. The lights provide direct, immediate alerts and require no input from controllers. In July 2013, the FAA re-scoped the program to 17 airports.