Signs Handbook — Apron Markings

Cross-hatched markings (often white or red) where no vehicles or equipment may be left unattended at any time. Maintenance and Compliance

On light-colored concrete, yellow or white markings often require a black border to improve visibility. Apron Markings Signs Handbook

Characterized by white lettering on a red background. These signify a requirement to stop or an entry into a restricted area, such as a taxiway or runway. Cross-hatched markings (often white or red) where no

Specifically designated areas marked for Ground Support Equipment (GSE) to ensure fire lanes and taxi paths remain clear. Safety Zones and Hazard Identification Apron Markings Signs Handbook