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United States Department of Transportation United States Department of Transportation

VGLS - Runway End Identifier Lights (REIL)

The REIL system provides rapid and positive identification of the end of runways. The system consists of two synchronized, unidirectional flashing lights that are positioned on each corner of the runway landing threshold, facing the approach area and aimed at an angle of 10 to 15 degrees. The REIL is effective for identifying a runway surrounded by a preponderance of other lighting; identifying a runway that lacks contrast with the surrounding terrain, and identifying a runway during reduced visibility. The REIL system provides three intensity settings and has an approximate range of three miles in daylight and twenty miles at night. A REIL system can be controlled by the air traffic control tower, remotely by the pilot, or manually from the control cabinet.