Holding position markings are among the most important visual aids on the apron-taxiway interface. These markings indicate where aircraft and vehicles must stop to maintain safe separation from runways, other taxiways, or aprons.
| Marking | Color / Pattern | Meaning | | :--- | :--- | :--- | | | Solid Yellow line | Designated route for belt loaders, catering trucks. | | No-Entry Zone | Red hatched box | Area directly under engine intake/exhaust. | | Equipment Staging Box | Yellow dashed box | Where dollies and containers wait pre-flight. | | Service Road Crossing | White "X" on red background | Vehicle must stop and visually clear for taxiing aircraft. | Apron Markings Signs Handbook
Apron markings are pavement signs, lines, and symbols on airport aprons (ramps) and adjacent taxiways used to control and guide aircraft, vehicles, and personnel to ensure safe, efficient ground operations. This handbook summarizes standard apron markings, their meanings, applications, and best practices for implementation, inspection, and training. Holding position markings are among the most important