Apron Markings Signs Handbook

Runway guard lights are typically installed at runway-holding positions to enhance the conspicuity of the holding position marking. These lights may be either elevated or in-pavement fixtures.

Some sources categorize the system more broadly: red for safety warning, white for traffic/vehicle markings, and yellow for aircraft movement on aprons, taxiways, and runways as per ICAO. Apron Markings Signs Handbook

All apron safety lines must be at least 10 cm in width and continuous in length. All apron safety lines must be at least

: This advisory circular contains the FAA’s standards for markings used on airport runways, taxiways, and aprons. It addresses everything from runway markings (landing designator, aiming point, touchdown zone, edge, threshold bar, displaced threshold, hold position, chevrons for blast pads, stopways, EMAS, and shoulder markings) to taxiway and apron markings. chevrons for blast pads