Which color identifies apron safety lines?

• A. Blue lines.
• B. Red lines.
• C. Yellow lines.
• D. White lines.

Answer: (D)

On the apron, safety and movement are guided by color-coded lines to keep people and aircraft safe. The white lines designate the apron safety boundary. They mark the space you must keep clear around an aircraft and the walkway area where pedestrians should travel and equipment should not cross. Staying inside these lines helps ensure you won’t encroach on engine intakes or prop wash and you maintain a safe clearance from wings and fuselage during servicing and pushback. Other colors indicate different zones—for example, blue lines for service roads, red areas for restricted entry, and yellow lines for caution or taxi paths—so white is specifically the boundary that identifies apron safety lines.